Can you plug a fuel return line 6L LLY LBZ LMM 2004-2010 Silverado 2500HD 3500HD Sierra 2500HD 3500HD Replace# 97328733 98062291 Apr 26, 2012 · Both are important in your fuel system. The engine starts and idles fine but wont rev more than a couple hundred RPM's. Jun 12, 2010 · The use of a return line has nothing to do with fuel pressure control - it has to do with fuel circulation and eliminating standing fuel in the line, contributing to vapor lock and fuel boiling. can i utilize that 1/8npt plug on the dual feed pipe and come out with tee one side a fuel pressure gauge and other neck down to a . Get one meter. The two line tanks dont have the return line. Then to engine at fuel in line. Dec 7, 2020 · Sniper EFI Tuning & Tech. There is a rubber line located near the bottom of the fire wall on both the send and return lines, but crimping them off isn't going to do you any good if you have no leak down. However on 2QM15 the fuel return line feeds the fuel back into the fuel filter for more immediate re-circulation. They don't cost much. 3/8" feed, 1/4 return and no reg as the internal restriction of the fuel filter maintained fuel pressure to the carb. If so, I think it'll work but I don't understand why you would put in this extra line. If you leave the bypass port open (no bypass plug) then you do not use a fuel line from the return to the tank, you just leave the factory installed 1/4" plug Apr 17, 2002 · A regular old engine driven fuel pump is two check valves and a diaphragm. You no longer have to mess around trying to figure out how you're going to plug off these lines. Then use the hard line as the return. 1/370, 7. Sep 11, 2013 · I went with a Holley 170 gph and made my own carb fuel line with t fittings at the ends tapped the rear with a 1/8" npt tap plugged it with a brass plug npt plug thst I drilled a hole in the center increased the hole until I got 7 psi cold at idle ended up with a . Conveniently, I can run it to the drain plug but, does that cause a problem with the weight of already in-tank fuel creating resistance to the incoming return line fuel? Most manufacturers suggest a return line to the top of the tank. If you put just a single droplet of fuel into the fuel system without letting it escape it would have to find a way to get out. That probably won't be enough pressure to fight inertia. View the part here: Apr 25, 2013 · you cannot just cap off the return line. Since there isnt a returnless adjustable fuel pressure regulator, you have to convert to return style to use an adjustable fuel pressure regulator. The other end of the return line connects to the top of the fuel tank. Maybe searching something like "plug return sender" or "plug return sending" will come up with some info on whether/how other guys have plugged this extra tube Dec 18, 2002 · Run a second line and get a bypass plug for your fuel pump. I've read some people install a new fuel feed line and use the original as the return. Dec 28, 2015 · It requires the same size delivery line as it does return line to the tank. I was under the impression that the fuel pressure sensor. Our 1/2", 3/8" or 5/16" aluminum plug will cap off these lines with ease, to keep fuel from seeping out of them and dirt from getting into your fuel tank. Even here in Fla the carb is cold to the touch in the heat of summer. Google "vapor lock" and you should find a Wikipedia link explaining this in more detail. To prevent such a calamity, I had an old filter head laying around, which a WIX 33358 filter fit onto. May 19, 2010 · 97 & 98 C5s had TWO fuel lines that went to the fuel rail one unregulated fuel supply line and one return line. If heating is still an issue and you can't remove enough excess heat, you can always add a fuel cooler in the feed or return line in a cool airflow area, but the fuel must circulate to take advantage of it. The question is, where do I attach the return line on the gas tank. The pump must provide a larger fuel flow (gpm or gph) than these keeping fuel flowing in the return line at a sufficient capacity to keep the fuel cool. O-ring included to prevent leakage. My Z has only one fuel line and mechanical pump so , it works well with one line. Aug 31, 2022 · To connect a fuel pressure regulator with return line back to the fuel tank, the regulator needs to be a bypass regulator design. In the event of a rail pressure control issue (typically low rail pressure) on a 6. that leaves the check valve in the fuel pump. Plug it at the filter and see what happens . 4. Does this sound right (tank to engine to tank circle)? Gas tank (w/ sender) to fuel pump/filter on rear frame rail. Jun 17, 2013 · The car has a 3/8 supply line and 1/4 fuel return and a vented gas cap. with the return line there is no pressure buildup between the fuel pump and the carb so the Qjet does not bleed fuel. Jan 19, 2023 · I had to replace the spider assembly. i have chrome dual feed to holley carb and would like to retain it. I have read that it is ok to plug the return and others say it should be reused. Feb 2, 2023 · For the purpose of your question and the style of pump you're using, the Sniper doesn't care if you have a return line or not. Aug 24, 2014 · I ran an EFI in one car and it had no return lines back to the tank, thus fuel was always hot . Generally you don't want to recirculate the fuel. 5 - 5. I assume it was originally hooked to a fuel pump with a return line, but that fuel pump left eons ago with the old engine. Just don't forget to oder a new fuel cap for the 70 tank, and make sure it's a vented one. The line you speak of is the return line back to the tank, the banjo on the back of the head returns fuel not used by the injectors, through this line and the front side of the distribution block Feb 12, 2021 · Also, you will probably need to add fuel filters (fuel injectors don't like dirt) and a fuel return line. Probably not rubber. So just route it along the same path under the car? This is a 67 vert. Next option would be to use an older fuel pump without the extra return line. i am also running a -8an return Dec 20, 2023 · To achieve that, there are two general choices of fuel system – returnless and return-style. Oct 10, 2017 · Using the s10 tank means that I need to use a different fuel pump. new one has a return fuel line port. Customize $ 293 99. I am replacing the GM stock Vortec intake with an Edelbrock RPM Air Gap and my Holley carb with a FAST EZ-EFI Self Tuning system using the '82 sending unit and in-tank Jan 29, 2016 · You need the gauge between the lift pump and the Injection pump. To accomplish that I used a fuel regulator with return port that could be cranked down to 4-5 pounds if necessary since the TanksInc pump is built for fuel injection and I am carbureted. Nov 7, 2020 · So EFI (Holley Sniper) needs a fuel return line. i have a tool that's designed just for pinching off hoses, but a vice grip with something to prevent wrecking the hose (a shop rag folded over a few times will do, with the vice grip set to only Jun 2, 2017 · That dirty line you speak of is the return fuel line back to the tank, you can use 3/8" fuel hose to connect it to the steel return back to the tank. Dec 20, 2011 · What size is fuel injector return line. Gasoline vapor in your fuel lines is not something you generally want. If the return is smaller, pressure can rise at idle and you'll always be rich. 【Easy installation】You only need to drill a 1/2'' hole without having to do any welding. you have a gauge after the regulator so you can set your pressure, correct? Jan 8, 2007 · SB, Edelbrocks specs are not to exceed 6. 73gear-Lunati cam'd Apr 20, 2020 · Hello Mopar experts, I’m reinstalling a Classic Industries fuel sending unit with a 3/8 fuel line and a either 5/16” or 1/4” return line. By. OK got it. *Can air in the fuel return line, assuming it can flow till empty of fuel, allow air to get into the injectors while the engine is at rest? *Should the fuel return line slope down to the tank or can there be low points prior to entering the tank? May 12, 2017 · Brand of carburetor makes no difference concerning return fuel line, you original setup supplied a return line from the fuel pump back to the tank. Apr 25, 2020 · The fuel return line is supposed to be low pressure and just allow fuel flow back to the tank. Be careful with the assumptions. Would it work to use the drain line as the feed? Probably, but it wouldn't Jun 18, 2002 · You really can't tell if you need it until you plug it. The third line is that return line that comes off the front left injector right next to that check-valve. If you can get access to a scan tool that can read the misfire counters, that would be my first step. Then just drive it and note what the pressure is doing. May God's grace bless you in the Lord Jesus Christ. Sep 13, 2023 · You will be reducing the fuel pressure for the rest of the system after that bypass. A QD to AN adapter with a AN plug would do it. Mar 9, 2012 · Rich H, thanks for your thoughts. Sep 22, 2017 · These restrictions are often contained in the return line fitting on the gas tank sending unit mounting flange. It has a small about 060 orifice that returns the fuel just like the pump does. Jan 14, 2002 · If I understand that diagram correctly, you plan to run a line between the fuel pump low pressure side,and the return line but also run the return line back to the tank. 5-2010 Duramax 6. You do need one (highly recommmended?) if you have an electrical pump. Maybe Nov 26, 2008 · the return setup was only for cars with Qjet 4 barrel carbs to help in returning unused fuel and vapor to the tank. If it is inconvenient to access this flange to remove the restriction, the return line can be re-routed to the fuel pump inlet line, as described above. Last week a mechanic determined it was the return feul line and what I am assuming to be a check Spark Plug; Wiper Blades; Headlight Bulb; Car Wash and Detailing; Clearance; Top Deals; Duralast Fuel Return Line DCF67-5068. Nov 5, 2012 · Just like the primary/feed line, short portions of the return were fuel hose where flexibility was needed and a long front to back hard line run in tandem (parallel) to the main line. They look like little plastic top hats. bottom line is a fuel regulator is REQUIRED for the system to operate correctly, and run a return from the regulator. 99+ only has ONE fuel line to the fuel rail. You take the plug out, insert the bypass plug up inside and put a fitting in to connect the return line back to the oil tank. 1. All is well until I notice I got a fuel leak somewhere in the Jan 12, 2016 · 50-55 is normal running pressure. Not something that you'd want to bypass But if you are having air issues the injector return caps are definitely a place to start. Feb 14, 2012 · Wix and other filter manufacturers make this easy to implement, they make a couple of sizes of throwaway filters with a built in vapor return port Wix no. Some people are fine living in a messy house with cars sitting on blocks in the front yard. Sep 15, 2004 · For super high performance motors that need a large volume of fuel, the return line/regulator system should be used along with a pressure gage. If you dont have that float assembly for the dual line, you start there. I put a filter before the pump and a small inline filter before the regulator. From valve back into tank. We installed the 360 with an Edelbrock 4bbl in the Matador coupe last week and yesterday it fired right up. 0 seems a bit low, you want to make sure you have a good fuel supply at WOT. It goes from the bottom on the port toward the front. Any reason (possible problems) why the line can't be eliminated and if so what is the best way to do so? Thanks Jan 8, 2016 · Aside from providing a path for excess fuel to return to the tank, the fuel return hose also prevents vapor lock and over pressurization from occurring within the carburetor. You need 20+# of pressure right up to the regulator at the carb. Maintaining your car’s fuel line can be done in as little as 15 minutes and is actually quite easy. I wonder whether the pressure issue applies here or not, as the circuit I think you are describing is where the the fuel return line returns the fuel to the fuel tank. Its simple with this riv-nut style fitting. But fuel can not be compressed. The pickup at the stock location has a screen on it to prevent any junk in the tank from getting sucked into the pump. If you get a fuel pump failure with no fuel return it is because the diaphragm was worn out or old. Best is to drill a hole in the sender plate and braze the return line in. Fuel Regulator Dec 19, 2005 · Big Block V8 - 385 Series (6. Some early cruisers used the same pancake fuel pump from the factory with no fuel return line. 33040/ 33041 are 5/16/ 3/8 fuel line with a built in 1/4" return port You mount them either vertically as shown below, or horizontally, as long as the 1/4 port is UP Jun 16, 2009 · While I cant say that I positively know the answer, I do have a plausible theory. Course, on my Mopars, the return lines on the carbed motors came off the fuel filter, I just plugged those. I think there may be an extra unused nipple that you can use. My car holds 6 pounds (or 7 or whatever) dead nuts on, all the time. Looking to put a return line in system , figure it would help pump life & run cooler and maybe quiet pump. IMPORTANT: This regulator must use a fuel return line. As for the hose or rubber line question the rubber line should be rated for efi uSE as well as any clamps used on the rubber lines because of the supply fuel pressure. I just took a piece of solid round stock,or a bolt with the head cut off,and drilled a 1/8" hole in it. 060 orifice that will be piped back to the 5/16" OEM. A lot of gasoline engines have a similar pump as well but at lower pressures. But you can run it like that and just put a lil rubber cap on it 70 Monte Carlo-461,th400 3500 stall 3. The "return line" in the 70's carburated datsun was actually a vapor return, to my knowledge. Fuel pump went out. Good rock and roll music should corrupt the young, it should corrupt them enough to think for themselves. ) Separate the pressure line (the one with the Schrader valve on it) using the fuel line tools. 2s mechanical fuel pump vs GMs latter 6. 3 May 26, 2015 · Your Edelbrock 1406, and any other modern 4-bbl carburetor, will operate best with fuel pressure of 4 3/4 to 5 psi at the bowl inlet. (See attached picture) I used a rubber vacuum plug as a temporary Oct 4, 2004 · HIMARKLIF Upgraded Diesel Fuel Injector Fuel Return Hose line Kit Compatible with 2004. were it not you can expect to burn up your injection pump in short order. If you run into vapor lock or hot start problems later in the heat of the summer, then you might consider either changing the pump for one that has provisions for the return, or running a fuel Jan 28, 2018 · Return line for me. Nov 18, 2016 · Sniper EFI Tuning & Tech. 1/4" fuel line is too small for 350HP. This process of cycling fuel from the tank to the injectors or throttle body and back to the tank is a complex process. '92 Ford Mustang GT: 385"/6. Simply clip our Jan 22, 2007 · Searched through the FAQs and others to find info on carb fuel return lines with no luck. My truck is a '77, the carb(I think) is a 75-based on the mfg date of May 27 so the oil that is not used by the nozzle is always sent to the return port. Feb 13, 2009 · i believe you are supposed to use a fuel pressure regualator and the return line should come from there. Jul 6, 2020 · Today we're looking at how to add a return or a vent line to a factory tank that did not come with either. 5s electric fuel pump is a great way to show the evolution and why the electric lift pump is the far This fuel is sent back to the fuel tank via a return fuel line. The main point of it is to keep the fuel moving so that it can't pick up as much heat and cause vapor lock. You can use the 5/16" for supply or return . Ther Jul 3, 2008 · In the fuel filter, I have the entrance-line coming from the lift pump, and the fuel exit which goes to the injector pump. 4309 NOTE: DO NOT RUN THIS PUMP WITHOUT FUEL (EXCEPT FOR BRIEF PERIODS WHILE PRIMING). No need to remove the factory installed regulator in the Sniper throttle body, you just cap it off. Feb 3, 2022 · The Holley regulates the fuel pressure on the return line port, if you regulate the fuel pressure before the Sniper you can plug the return line port on the Sniper. Next, connect the return line to the bypass fuel pressure regulator at the return or bypass port per the instructions, typically at the bottom. to/2TENqIvPass-thru tank fitting: https://amz Oct 9, 2017 · Have a 350 in a 50 chevy with external new Holley red pump #12-801, preset at 7# no need for regulator, new gas tank with extra port for return line. The fuel line going back behind the bench, and dangling Apr 12, 2019 · Hope it all works out for you! You could always slip some DEI insulated covering over any exposed line that you think may be adversely affected once the car is running, during assembly. Fuel pressures cannot be adjusted if the fuel return line is absent. Its stainless steel construction ensures this unit is built to last. BUT there is a restrictor in the line that allows small amount of fuel to return to the tank. I just did some fuel system testing and the return line had significant aeration. Return Fitting On Sending Unit: No matter what line you use for the return you'll have to install the bulk head fitting on the sending unit. It should be noted that a blocking style regulator does need an internal or external relief valve at the fuel pump, relieving bypassed fuel and pressure to the fuel tank. It only did it when it was hot out. (Just not cost effective in some cases). 0/429, 7. What squeeks by the regulator is under low pressure. You dont generally need to run a return line if youre running a mechanical pump. If you run a return line make sure it dumps INTO the fuel -goes down below the surface, and not just returning on top. The stock return fuel line is too small of a diameter, but you can get around this by using the fuel pump that doesn't require a return or by using Holley's filter/pressure regulator near the tank and doing a short return from that. It's a common trick for company truck drivers to carry a pair of vice grips to put on a fuel return line to get more power and speed out of a diesel. This reduces weight, complexity (routing a return line can prove to be difficult), and expense. Running a return to the tank keep circulating the hot fuel but while maintaining a 55# psi on the injectors at all times. Jan 16, 2014 · Take an old spark plug, or a new one either way it can still be used afterwards, just stick the non-threaded end in, push it as far as itll go, fits perfectly, and doesnt leak any fuel or slowly slide out, have an engine on a bench with. This will replace your worn out factory lines. This unit will include the necessary rubber gasket and a new lock ring for installation. The return line requires a minimum volume of gas being returned to keep the fuel cool. Whether or not it's needed is affected by engine type, ambient temperature, emission controls, air conditioning, state of engine tune, driving speed and environment, type of cooling fan . Jun 6, 2008 · Keep the 3 line system. 255 lph is good to about 600 hp. The fuel return line runs between the fuel return port of the regulator and the fuel tank. You can have adequate flow, but not enough pressure. FUEL PRESSURE REGULATOR (RETURN STYLE) PART NO. you just connect to the 5/16 steel with rubber hose. Vapor lock occurs when the fuel pressure or temperature rises too high the fuel can begin to vaporize and cause issues. YMMV Bruce Sep 26, 2020 · Regarding the fuel lines, you can run an AN line up to the fuel rail. With a return the fuel keeps flowing and extra fuel returns to the tank, which pulls cooler fuel up to the pump. Or use the EFI hose for the return. Part # DCF67 Oct 9, 2018 · First hand experience: My SBC daily (old Blazer) has a return line. May 4, 2022 · If the old pump still works, you can use it to pump the tank out. fuel pumps with a build in return line have a lot more Mar 5, 2021 · I did see the reference to vacuum pressure and the fuel pressure regulator. The reason for the return line is to keep the fuel cool, not to change the pressure. We eliminated the EGR and related emissions hardware. Can I use the 2001 fuel pump without a return line? Oct 30, 2006 · C3 Tech/Performance - Vapor fuel return line - As I'm updating my 75 I plan on using a Holley (to support the 383 stroker going into the car) which only has an inlet and outlet and not the vapor return line . Some options to do that are the Corvette fuel filter which doubles as a regulator, it mounts down by the tank and has a return line port on the filter. Oct 3, 2010 · 2. That way you will know that exposure to line heating isn't the problem if there should be one, and look at heat soak evaporating fuel from the carburator. It had a vac port built in that read boost pressure. Look in the A/C repair section for the fuel line tools. 200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration . Mar 11, 2011 · ok, the tank vents good. Sound right? Oct 4, 2004 · Small, blocks off the return line so you can test the regulator, injectors, and fuel pump check valve for leaks. Sep 4, 2023 · The first point of the regulator is maintaining proper fuel pressure pump-to-carb, so that's a benefit. When installed in the return line it restricts return fuel but still allows some to pass. Not sure if you wanna cap it off, maybe a long rubber line pointed to the ground would work, just to make sure it doesn't fly back with airflow and hit something really hot Oct 31, 2013 · You may look at the tanks inc efi fuel tank with in tank pump, you can regulate it down to what ever you want and it has an in tank pump (what ever size you need), return line, vent etc. The float assembly in a dual line setup has 2 bibs on the piece that twists into the top of the tank along with the fuel guage tab. Filter/Pressure regulator Jul 31, 2010 · mine has a line going back to the gas tank, it's my "return" line don't know much about it, but if Ryoken is right, you could prolly just Y it into your carb supply line. Think about it, the end of the line into the tank is open or at least restricted by only by the small rubber backflow valve on the end Apr 3, 2011 · Many times a restriction in a return line will cause your IP to inject a higher volume of fuel and overrun the governner. Aug 16, 2012 · Second my truck wont start, i dont have any leaks up to the filter housing, new adp race plug, new filter housing/ filter, pump stays semi hard (thats what she said) after cranking, fuel rail psi goes from 181-203, and desired is around 6k, well i took off the return lines on 2 and 7and fuel was coming out of the return line, are they connected Jan 23, 2020 · The other advantage of the return line is to drop fuel pressure at the carb once the engine shuts down. Not enough pressure could be a blockage in the lines, bad lift pump. Do like what Magna Fuel says and run a return line off the bypass regulator at the carb back to the tank. Sep 2, 2008 · a return line gives you room to run more fuel pressure if needed. It doesn't mean it'll work fine for you. That's the line that I want to plug so that the vegetable oil won't return to the diesel filter. Put it on and plugged the return hose. doesn't the gas cap vent the tank also? i am replacing my orginal tank with a stock replacement that has been sumped (2-10an feeds & 2 -8an returns) so i can run my main -10an fuel line, and -6an nos fuel line, i replaced the old sender with a new one (for a 78)and put a section of hose going from the senders 3/8" fuel outlet to the senders 3/8" return line. I have done carb swaps on bmws, jeeps, fords, and vws with no issues. Small, blocks off the return line so you can test the regulator, injectors, and fuel pump check valve for leaks. and the reference of a High pressure regulator and a return. one way to check this would be to pinch off the hose that runs from the frame to the fuel pump after you shut the engine off. May 7, 2008 · I just put a new injection pump on a 1990 non intercooled cummins. There is an adapter available to go from AN to the QD to pop it on to the pressure line. The single outlet filter is also your pressure Oct 27, 2019 · I have not done the work on this particular engine but on other manufacturer engines, from four cylinders up to v8s, I never needed to put a restrictor in the line. There are many ways to accomplish this task. 3? how to remove fuel injector plug in on a 2007 chevy suburban 5. There is very little pressure on it, unless you plug it up or something. is there a plug for this ? and where can i get one or con i plug it with something? jb weld and a screw/bolt? it is pressurized by the fuel pump dont know how much pressure. Dec 22, 2015 · Return lines were used from the factory with mechanical pumps on higher output Q-jet applications ie: SS. Aug 12, 2019 · A fuel pump with 2 ports will be fine to plug the the return if you have a three port then just hook up the return I think there not mandatory since alot of return pumps the return line port gets clogged and doesn't effect anything! Get a inline fuel pressure gauge there cheap then decide if you need a regular I would be surprised if you did! Jun 30, 2021 · Dumping fuel into air can cause a lot of excess fumes. You can also make one yourself, using a short piece of regular return line and a tightly fitting screw that can be securely inserted in one end of the short line. Apr 11, 2015 · The IP return line is routed under the intake manifold and may appear to tie back into the supply line back behind the manifold but continues back tracking along side the fuel supply line. Jun 18, 2014 · Nope, no return get a good out the back 15psi gague NON liquid filled, set to 6psi. Big difference. Remember that the pressure regulator is "plugging" the fuel line in order to hold pressure in the fuel rails. I would either run a return line to the tank, or get the right pump. 5 psi, I think if you checked the pressure that your pump puts out you will find it to be right in that area. That will then narrow down where to look for the problem. GMs early 6. I got mine for 500. Too high a pressure blocked return line orifice or line. 3L SBF, Dart SHP 8. On a Quadrajet, fuel can siphon out of the float bowl past the needle and seat leaving you with an empty carb when you go to crank the car after it has sat for a while. Aug 16, 2020 · Having a return line should help prevent vapor lock. for a filter with a return Aug 2, 2021 · I'm aware of the two types of fuel systems (return and returnless) and my truck has a returnless system, however I have a repair bill from the previous owner stating that a replacement spider with a return line was fitted and it looks as though there's a metal plug in the return line. the return line must be functional. Squirrel ^ gave me the part no. will the gas dissolve the plugging material? Feb 14, 2006 · By return line, do you mean the injector fuel lines? If so, the Cohline lines (P/N 6050780581) should do the job. you can re-create this bsetup by placing a tee near the Mar 27, 2020 · Today we'll run you through how to install POL's Universal Fuel Tank Return Line Bung on a gas tank with our head tech, Randy Garrett. . Mar 24, 2019 · However, it DOES have a return line that is currently just hanging out in the engine bay, and pukes fuel if you fill the tank up all the way. One possible cause of low rail pressure is an injector that is returning too much fuel back to the return rail and fuel tank. I do not have a return line connection on the new fuel tank (non EEC version is what i bought). A fuel return line prevents the engine from running out of gas if the car is turned off in an unsafe spot, like on railroad tracks or a tight road. Current fuel pump has no provisions for a return. 050 hole. I also mounted a fuel pressure gauge that reads 1 to 15 pounds on the regulator. Closer to the IP the better. Oct 13, 2007 · So, I'm going electric with a bypass regulator. Jan 27, 2024 · 【Feature】Allow you to add the threaded bung on the fuel tank to install a return line. A returnless fuel system uses one line to deliver fuel from the tank to the engine and relies on the ECU to control the pump and vary pressure as needed. Dec 10, 2022 · How do you remove fuel injector plug in 2007 Chevy 5. Nov 8, 2020 · This is a Quick install video of the Injector Return Line Kit from Quadstar Tuning. Had a new one on the shelf without a return line fitting. You can and will deadhead the fuel pump and shoot pressure to the max, so don't run the car with this in place. Do not remove the regulator in the pump unless you want to run a external regulator and a return line. As others have said, it's an anti vaporlock device. A 2001 Silverado fuel pump will fit in the s10 tank. The photo posted is very simular to what we have on our race car with 1/2" ID lines hard fuel log and the same type regulator etc. You will need the 1/2" & 5/8" ones. Standard rule of thumb for street setups is 3/8" fuel line, and 1/4" return, if you run one. I'm not sure what to tell you,but if you are going with what the car came stock with,go with a stock style set up. The issue is the 2001 Silverado pump uses a return line and the 2006 Yukon engine/computer does not. Wondering how you have selected and routed this line. both will lead to fuel starvation issues. Have some ideas but how/where/size would you tap in return line to run back to tank. Every other truck I've seen with this engine has the fuel supply and return line coming into the top of the assembly. Apr 27, 2020 · The SIMPLEST way to CORRECTLY return fuel to your tank on a return style fuel system!! The gas tank filler neck return line adapter: https://amzn. going through this post, you should now understand what fuel lines are and how they work Nov 1, 2009 · Just hook up the main fuel vapor canister hose to the back of the carb or the NPT threaded manifold vacuum port between the carb and the distributor and plug the other canister hoses, or just rip out the canister altogether and plug the hose going back to the tank. It also is plumbed with the ¼ inch return line. Maybe someone can help--Just finishing the rebuild on an Aisan carb to replace the weber I currently have installed. So they have a high pressure fuel pump. As the engine demands fuel, the carburetor float bowls (or fuel rail) begin to empty causing fuel line pressure to drop. " no return line is needed with a mechanical fuel pump on an SB350. No additional vents on gas tank. Make sure when doing new fuel lines you blow them out good with compressed air to get any debris out of it. In this short video, I will show you how to properly add a fuel return line or tap into your existing fuel tank. I used a standard Holley regulator and modified it for use as a return. 00 with pump 255 lph and much quieter than a inline pump and baffled if you ever want efi. Nov 14, 2011 · You can run a single and plug the return, if you still have the factory tank and setup it has its own vents already so you won't need a different cap. If you don't have a crossflow muffler, there will be plenty of room in front of the tank. 3l v6 origional no return fuel line. Sep 22, 2019 · Connect any standard fuel pressure gauge to the 1/4 inch schrader valve connection AccurateDiesel LML/LGH Duramax Diesel Injector Return Line Plug Tool (Replaces Jul 9, 2018 · Link to some of the fuel line ends I am using in the video: Earl's Performance 750166ERL hose end: https://amzn. If there was an issue I would have known about it. Aug 2, 2006 · Can you install a fitting on the gas tank fill hose/tube? Then you could have the return line dump into the tank fill line. This makes pump designs a bit harder. Jan 12, 2017 · Requires no fuel return line and fittings from the regulator to the fuel tank. its only $4 per meter. Out from engine at fuel return to fuel return valve on front frame rail. with the fuel trapped between the fuel pump and the carb expanding it causes the Qjet to spill gas into the engine and cause emission problem. Order today! May 16, 2012 · On your new tank you only have 1 port (the top one) for venting. Pressures over that can overpower the needle and seat in the bowl and allow the pump to blow raw fuel into the intake manifold, creating a tuning nightmare for you. Get one of those vent assemblies (plastic housing with cotton in it) and as mentioned plug up the bottom one which looks like it may have been a drain plug (?), and then use your single line senderassuming the sender works righta whole topic in itself! Nov 13, 2005 · 3: run the bigger (-6) return line to the bottom of the fpr and snake it through the engine bay whatever way you want to get it back to the tank 4: take the filler hose (goes from where the gas cap is to the gas tank) off and cut about 1-2" out of it so the adapter fits in Oct 21, 2010 · use fuel injection hoe clamps from napa cinch them down firmly but not tightly and you will never have a problem again in that area of the fuel return system 1994 3500 dually build date:12-93 new:trans, t case, cage long arm suspension sulastics, pre filter/heater MIA / HX35/40 4/5inch exh more much more May 10, 2018 · Instead of changing the fuel pump you can run a Wix fuel filter 33041, that has a return line built in. Apr 18, 2023 · Return: For the return line, you can run the EFI fuel line off the sniper outlet to the factory fuel hard line. Here are a few methods we've used in the past John Deere Fuel Return Line - RE590026-John Deere Fuel Return Line Replaces AR68961 and AR50732. The 2bbl 304 that we took out had a fuel return line to the tank that came off the fuel filter. Aug 1, 2007 · Charlie,the return line on my stock type return line equipped fuel pump sprung a leak,and my Class A mechanic buddy said I could not just plug it and expect proper operation. The return line should return line to the bottom of the tank. But I lack the knowledge Im sure you all have in spades. I am running a carb and do not need the return line and therefore I would like to plug it. Likely run the carb out of fuel. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Customer: replaced spider injector 20064. it was used as a return to ensure the fuel didn't vaporize in the lines and create a no-start condition due to fuel vapor-lock. If you need a fuel return line to your tank, just get a '73 vette fuel pump Nov 3, 2002 · the holley has a lot more fuel bowl volume because of the 2 float bowls. I used a short piece (4") of fuel line over that bulge with a clamp downhill from the bulge, then a short bolt screwed into the hose and a clamp over the threaded part of the bolt/hose. If you used the drain line, you would need to add a filter before the pump so that any potential junk in the tank doesn't get sucked into the pump. Jan 1, 2009 · Fuel pressure checks on returnless systems can be done in the usual way by attaching a gauge to the service valve fitting on the fuel supply rail, or you can hook up a scan tool and look at the fuel pressure PID to measure fuel pressure. Thanks, Bart Jul 24, 2018 · EFI systems require a return line to move unneeded fuel from the fuel injection system back to the fuel tank. So adding a cheap aluminum hard line in the fuel cell (like a siphon line) to move the fuel away from the pick up and below the fuel level should stable out the psi at the regulator since it is no longer feeding the pump air. with out the restrictor the engine will run out of fuel during longer runs, with a stock mechanical pumpin either I6 or V-8 cars. You can have adequate pressure, but not flow enough fuel. You just need to somehow cap the return. The spider assembly didn't come with any kind of plug or cap to seal the return line. My has no clamps ?? were can I buy it aftermarket. That filter acts the same as the return on the pump and will prevent vapor lock. 7L the injector return line plug can be a valuable part of the diagnostic process. Do I need a return line? Will I have problems with no return line? I plan to plug the 1/4 return line or buy a fuel sender with the 3/8 inch delivery line only. 200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/. 623" lift 114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Feb 28, 2021 · I have a 67 very 6cyl that I installed a 2300 sniper on. they also have the end plug for the last When gasoline gets hot it turns into a gas. When installing a bottom sump with your AirDog or Fass Pump most trucks end up with an open fuel supply and or return line. Check out Quadstar Tuning May 23, 2007 · It's best to make the return line the same size as the supply. Jun 21, 2011 · the engine is a 1975 400, so there are a few differences. In fuel systems with a return line, the fuel pump is continuously pumping gas through the fuel system at a much higher rate than is actually Dec 16, 2014 · C3 Tech/Performance - FAST EZ-EFI fuel return line & fittings question - I have a GM Performance 350 HO in my '80 Corvette Turn-key in my '80 Corvette. You can also use a fuel pressure gauge to cross-check the accuracy of the scan tool fuel pressure reading Aug 13, 2004 · I've sold a couple thousand carbs that were going on 40's with the pancake fuel pump. After a hot soak, fuel trapped in the fuel line between the pump and the carb can begin to boil, raising the fuel pressure high enough to push fuel past the needle and seat and flooding the engine. 【Fitment】9/16"-18 to 6AN fitting, will work on material up to 1/4" thick. The one being installed is a special rubber plug that only has one opening. Jun 4, 2013 · Which supports the theory why return systems are a more effective fuel system. Went from an immediate starter hot to taking 5 or more seconds of cranking when hot. Gene Nov 26, 2016 · vwchuck wrote:Don't assume that the fuel in your return line is not aerated. We run return lines on all engines, whether running electric or mechanical pumps, and with fuel pressures as low as 4 psi from the stock mechanical pumps. Dec 29, 2012 · Called a drip return, it connect to the caps on all the injectors, they allow air to clear the injectors. Apr 3, 2017 · But need a plan. If you would install such a line in your 70 car, the return line is 3/16" line, you could use brake line. I have a new fuel pickup with the 1/4 inch return line that is not installed. The larger one if there are 2 on the fuel rail. Please any and all help and advice is greatly appreciated. 470" forged steel crankshaft & H-beam rods, Wiseco 4. Dec 17, 2017 · Plugging the return line should not damage the pump. My truck has the return line coming off the engine block facing the firewall. As for the plug line at the end of the rear injector, just take the metal plug out of the old line and put it in a section of new line, I saved myself some money doing that since a new plug was nearly $10 from the dealer. Does this imply that you can interchangeably fit "with May 27, 2020 · Why would you run a return line and not use a return regulator? There is no cost difference to speak of. If you are forced into a no-return type pump then use the OE fuel filter for a full size Jeep Cherokee with a 360 (try '79 as a jumping-off point) as they have the return line at the filter. Aug 19, 2020 · You'll need to replace what little rubber line there is with Holley's VaporGuard line. to/2W0uoNTs Jan 13, 2010 · A fatal flaw with the HFCM is that the fuel supply entering the water separator is unfiltered, so any debris from the tank can clog up the water separator, and cause the “water in fuel” light to turn on. John Deere Spark Plug Gap Guide; John Deere Belt Guide; Nov 14, 2012 · The fuel pressure in the return line is based on the size of it. It is marked return. Jan 31, 2005 · The three-line tanks have a fuel supply, fuel return line, and the line to the charcoal canister. . So with return. Get a bushing for the top of your tank and put the line in there. As line pressure drops the fuel bypass valve descends, progressively closing it off, thereby increasing fuel flow and line pressure. I put a return line on my truck, it fixed the fuel starvation issue, which I think was due to fuel boiling. With no return line the fuel dead-heads when the float needle closes off flow, and it picks up more engine heat. Aug 13, 2005 · Joe my return line, (not the pump itself), has the bulge on the tip of it. I would suggest connecting things up as original to avoid things like vapor lock from your fuel boiling, because of no return line. If you return at the bottom there is a chance the aerated fuel will get sucked back in the pump inlet. 2 block, Eagle 3. Jun 10, 2005 · Another issue to look for is if you use a windowed needle and seat like the stock GM one on the higher-performance Q-Jets, you should have the fuel filter with the check valve to prevent the fuel level from dropping in the bowl after shutdown; the "windows" are below normal fuel level, and as the fuel level drops and pressure rises as fuel Nov 11, 2016 · C3 Tech/Performance - Ok to just plug the leaking fuel return line? - Replaced the fuel pump on my 68 NOM 454 and set it up like a 72 LS5 so there is a 3/8 fuel feed line to the fuel pump and a 1/4 fuel return line from the fuel pump back to the fuel tank. Others aren't. Mar 17, 2013 · The car has a high volume mechanical fuel pump, SMI Stage II Quadrajet and a new 3/8 inch main fuel line from the engine compartment to the fuel tank. Mercedes W123 Fuel Return Line Replac… Guide ID: 22561 -Draft: 2020-04-23 May 26, 2008 · There is almost ZERO pressure on the return line to the tank! You can plumb that in with any gas line that would be safe to use with gasoline, just make sure it is strong enough to not break from vibration, etc. the fuel pump mounted previously on the engine has 3 total lines- one is supply from tank, one is exit line to carb, and a third that is (at least i thin) a return line for unused fuel. Feb 1, 2013 · On Sandy's X I made a pill and installed it in the return line,more pressure and no vapor lock and no residual fuel pressure if you need to remove carb. otherwise you will need to install one. Mar 9, 2008 · The fuel line and the smaller return if on your car go thru the sending unit. If you dont have a regulator (be it on the rail 97-98 or in the filter 99+), the pressure at the injector is probably way too high and not constant so your AFR will vary a LOT! If you have Jan 29, 2015 · i have seen all the post up to date on fuel return lines. the are sealed with 2 o-rings each injector plus 1/4 fuel between each so lots of potential air leaks, especially if they haven't been replaced in the last few . if you plug the bypass then you need to attach a fuel line from the return to the tank (the second pipe). In this type of system, fuel doesn’t return to the tank. On my old car I used a boost referencing regulator. The sending unit has a 3/8” fuel line and a 1/4” return line with a rubber valve to prevent fuel from escaping out of the return line. 5/460) - Plug the fuel return line?'85 460 - A friend of mine has been having fuel delivery problems with his stock, 1985 F250 4X4 with a 460 for well over a year now. If I plug the fuel return from the injection pump it will run like its supposed to. The performance fuel pump that I have does not have a return line. When people say "it works fine" that just means it works fine for them. ibacof tkqzi cuwgv blmtk ojhbfn pgnd jlqkegwkx iohkhan voqsuw hypl