Fuel pump check valve fix My Jimmy starts instantly every time if I turn the key to "on" for a couple seconds, then "off" for a second or two, then turn it all the way to "start" as normal. And you don't have to replace the fuel pump to replace the check valve. Fix your fuel pump without removing the tank or replacing the pump itself. If you are loosing pressure then replace the fuel filter. Nov 20, 2022 · OK, have the leaky fuel check valve tried to replace O Rings, gave up on that idea, so replacing the check valve Bike is a 2015 FLHTP Electra Glide PROBLEM ISno videos on the NEWER rushmore 2014 up that have the Delphi units with a connector at the fuel pump (see part below) so I need to Jan 6, 2016 · I agree it sounds like a bad fuel pump (probably the check valve in the pump), or possibly a bad fuel pump relay, or (unlikely) a leak in the fuel line somewhere. Mar 9, 2012 · Marty, you put in a check valve, which blocks flow in one direction. In morni Mar 13, 2015 · A Bad Fuel Pump Check Valve. Crank the engine and watch how the fuel flows from the line. 97 UP XJ'S DO NOT DO WILL BLOW FUEL LINE OFF TO MUCH PRESSURE. If your check valve has failed, the gas doesn't go back to the proper tank, or the front tank just pumps into the rear or vice versa, and could starve the engine too. If you see steady, strong spurts, then the pump works. But if it is filling now with the check valve in place then I would say your shuttle valve is now bad and it is located inside the fuel delivery module. Dec 12, 2016 · Inspect the fuel pump visually. The check valve maintains fuel rail pressure when the engine is shut down. Mar 11, 2011 · Don't worry, I did my research before posting, so I understand that it might be the check valve in the fuel pump (in the fuel tank) and that I have the option of putting my own in line check valve into the fuel line. 9, 5. I have hear several people just lift their box to work on the fuel pump. ONLY WORKS 96 AND BELOW. I am pretty sure you are right in that there is a check valve, at the output of the pump, to prevent bleed down when the key is off. 0, 5. This makes it easier to start the engine. When the check valve fails, fuel rail pressure bleeds down, resulting in long crank times on the next cold startup. In Most Cases; Hard starting is a result of your fuel pumps internal check valve failure; Install one of these in line check valve fittings and restore fuel system pressure. If your car has a bad fuel pump check valve, the biggest issues you'll notice are your car will run poorly, stall, or it won't start at all. Oct 3, 2000 · The repair replaces the entire fuel pump module, which includes the electric pump, the fuel gauge sending unit, the pump intake screen, the rollover valve, and the check valve. Detach the fuel line from the carburetor and put it in an empty container. Sep 1, 2009 · It was suggested that my fuel check valve has gone bad and needs to be replaced. The fuel filter does 3 things Filter/Check valve and pressure regulation. Dec 26, 2011 · When you take the hat off there is a plastic line that goes from the hat to check valve. 2-3 PSI 3- Engine starts and idles for 20 seconds. Ok , So I was having a starting problem on my Jeep cherokee. I would MUCH rather replace that than cut the fuel line, insert a check valve, and then hope it doesn't leak afterwards. co. If the check valve fails or is jammed open by fuel contamination, the hold pressure will leak down. Click to expand I have a 96 GTS and had the same problem fixed by replacing the regulator on top of the fuel module assembly. 8 or 7. nz Jun 3, 2012 · If it's good, the only way to fix the check valve is to replace the pump. I called my local Jeep dealer and the parts guy had no idea what I was looking for. < 5 PSI 4- Engine idles and fuel pressure creeps up to 45 PSI. Both of my trucks have this problem. If fuel is dripping, the diaphragm is faulty and you need a new pump. 2007 S80 V8 166k; 2010 XC70 T6 294k; 2006 S40 T5 AWD M66 260k; 1970 Dodge Super Bee 383 Magnum 122k Apr 6, 2010 · The Fuel supply pressure hose plugs into the check valve and the check valve plugs into the tube going into the fuel tank. It fuel system should maintain a constant 40lbs give or take a very small amount. The check valve prevents backflow from the pressure side, the shuttle valve ensures that the fuel return line is only connected to the tank with the pump operating. That is not the same as a pressure regulator. POSSIBLE CAUSES · Failed check valve on the fuel pump in the gas tank. You will need to refer to the owner's manual. Oct 24, 2017 · Hold pressure is maintained by the fuel pump’s check valve when the engine is turned off. From what I have been reading, the culprit of loss of fuel pressure is the submerged hose, but I plan on replacing everything (hose, check valve, pump, gasket holder, etc) "while I'm in there" Oct 14, 2013 · The fuel pump itself contains the all important check valve though so it will fix the usual including slow start problems. You can pressure check you fuel system and watch it to see if it actually primes the system properly. See full list on everythingcars. Solve The fuel feed problem w ith these smart pressure repair kits. As has been explained, the hard starting is due to the check valve not keeping the fuel line filled with fuel and the gasoline drains back into the gas tank. Sep 17, 2013 · CROSS TANK FUEL FLOW CONDITION: DAMAGED CHECK VALVE TECHNICAL SERVICE BULLETIN Reference Number(s): 93S68, Date of Issue: September, 1993 Related Ref Number(s): 93S68 ARTICLE BEGINNING CROSS TANK FUEL FLOW CONDITION APPLICATION Model(s): All 1990-1992 Ford F-Series Trucks equipped with 4. Replace the fuel pump check valve with one that meets the specifications of your vehicle. Oct 20, 2016 · buy a foot of 5/16 th fuel line and an 8 MM 5/16th check valve, 4 ring clamps of that size, and then cut about an 1" and 1/2 out of the plastic line that runs from the tank to the fuel filter use about an inch of the 5/16 th hose on each side of the cut, place the 8MM check valve in between and attach with the 4 clamps, just putting a 6MM 1/4 The check valve is on the fuel pump and the fuel pump is in the fuel tank. Can I clean a faulty fuel pump check valve? In some cases, cleaning the valve seat may resolve the issue. Sep 17, 2024 · 1. What’s the fix for a bad fuel pump check valve. 5 Liter engines and Dual Fuel Tanks Dec 3, 2019 · Fuel tank contamination can also damage the seal in the fuel pump check valve. I would next test the relay by jumpering it, just to be sure it is not the relay. The check valve is inside the fuel pressure regulator located on top of the fuel pump. Oct 17, 2010 · 1- Key in on position; fuel pump primes for 2 seconds then stops. How often should I check my fuel pump check valve? It is recommended to check the fuel pump check valve every 30,000 to 50,000 miles or as specified in your vehicle’s service manual. As far as I can tell, that check valve is in the top of the gas tank. When gas is pumped to the engine, what isn't used is pumped back to the gas tanks. 0 PSI 2- Cranking over the engine. 2 questions: - Is there a write up anywhere on how to replace this check valve? Sep 13, 2010 · Dropping the gas tank is not difficult, it can be done in ten minutes. Dec 12, 2015 · Each time you turn the key, the fuel pump runs for about 2 seconds, pushing fuel up to the engine and building pressure. Sep 25, 2007 · The 4746407 was only used from '92-'95, starting in '96 the check valve isn't in a separate component it's in the fuel pump module. And valve to pump. Do you have a way to datalog your car? I would check your fuel pressure through the ecu through the throttle range. I show testing ot see if the fuel pump check valve has failed causing a extended cranking time. Last time I checked you didn't need to replace the whole tank but you do need to drop the tank to get access to the pump. Related Discussions and Site. Sep 19, 2016 · ² Fuel pressure bleeding past the check valve in the outlet end of the fuel tank mounted fuel pump. However, I wanted to post all of my symptoms before I jump to any conclusions. Dec 27, 2005 · Yes it is replaceable. Bosch 1587010536 Fuel Pump Check Valve. . Symptoms Oct 30, 2008 · The check valve you are talking about is also the fuel filter. If you must have the entire assembly Delphi is often recommended but avoid Airtex, Spectra, and store brands like Autozone's Duralast. It is still a PITA but better than replacing the sending unit. The pump usually has enough fuel pressure to start the engine for the third time. Check for any cracks or leaks. Dec 1, 2004 · Generation 2 got rid of the selector valve, using instead a "fuel delivery module" in each tank. Personally I would just change the fuel pump itself using the Bosch replacement. If you see a weak stream or nothing at all, then you Apr 7, 2019 · There's no external leak so from what I've read the likely culprits are the fuel pump check valve or a leaky injector. It is possible to just swap in a new check valve, like if you have an old, dead fuel pump lying around. 2. Sorry about the dark video we have 2 lights in the shop wit Andy Phillips shows how to install an inline fuel check valve very easily; fixing a fuel pressure leak for less than $10!DISCLAIMER:The individual featured o Oct 12, 2007 · "One of your fuel pumps has a bad check valve, (or somebody sold you the wrong pumps). ² Fuel pressure bleeding past a fuel injector(s) To check if this drop is being caused by (in-tank mounted) fuel pump outlet check valve or fuel pressure regulator you can clamp off the return hose from the pressure regulator at the end of the Oct 3, 2013 · There is a small button valve at the bottom of the assembly in the corner of the flat side that is held down by the weight of the fuel in the reservoir if the fuel inside the tank gets lower than the "FUEL PUMP" this insures the pump is surrounded by fuel to help cool it, it is also cooled by the fuel being sucked directly through it. And what you did replaces that check valve that is not holding. The check valve is built into the pump and is not replaceable as a separate part. The FDM has a high-pressure pump, a check valve and a shuttle valve. qtjkg cbplsst rcgc mmwfo aou uyw jnv hrpq aeyebj fmrst uxlvc vkmq goeb zvuz yrpjakqxs