Question about 1996 Chevrolet Cavalier

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Please help I had a leaking fuel injector and replaced the o rings and replaced fuel regulator and now it wont start. how do you prime like you said.

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  • Patrick Harrison
    Patrick Harrison May 11, 2010

    do u have multiport injection (one injector per cylinder) or single injector

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All u do is crack the system open by the injectors turn the key to on and wait till all air is gone out of the system (fuel will squirt out) then tighten lines back up repeat for each cylinder

Posted on Aug 30, 2008

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On fuel injected cars just turn the key on you should hear the fuel pump run for a few seconds turn the key off then back on. Also make sure the injector harness is plugged in.

Posted on Aug 28, 2008

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1 Answer

My fuel pressure goes to 60 pounds when the keys is turned on then starts dropping Is it my fuel pump or pressure regulator? 2004 GMC Yukon XL


Fuel pressure may drop due to a leaking injector or bad check valve in the fuel pump itself. The regulator does not come into effect until the engine is running and a vacuum supply is produced to it. If the regulator is leaking internally, it could send fuel back to the tank as well. Prime the fuel line and pinch off the return line ( if possible ) to eliminate a regulator problem. If the fuel pressure drops with the return line pinched off, suspect a leaking injector or fuel pump. If injector is leaking, the vehicle should run rich and cause a hard start/rough run condition

Jul 25, 2015 | 2004 GMC Yukon XL

1 Answer

I replaced a fuel injector on my 95 Cavalier and now it wont run


Use a gage and check proper fuel pressure, 41--47 psi, key on engine off. Cycling the key on and off a few times before you crank it, should prime the system.
Check for fuel injector pulse, use a noid lite, engine cranking. The voltage for fuel injector probably goes hot with the key on. The computer grounds the fuel injector circuit. The diagram is for 2.2L engine. The pink wire for fuel injectors is voltage, the bottom wire is ground. We've talked about the fuel system, could be other issues?

fuel injectors-mbl3q30razq005ehaxtcof2q-5-0.jpg

May 01, 2017 | 1995 Chevrolet Cavalier

2 Answers

I have to pump the throttle several times and then it starts sometimes and sounds like backfireing allthough its feul injected!


'pumping' a fuel injected engine is NOT like the old days (like with a carb)-if you hold the petal to the floor, it shuts off the injectors-NO petal, the injectors pulse (and dump fuel to an engine that is slow to start). If you are having hard starting, chances are good you have a flooding condition-leaking injectors, leaking O-rings, a damaged fuel pressure regulator could all be re3asons for your hard starting (and backfiring from a flooded engine). You should try to HOLD the petal to the floor and see if that helps-if it does, you should get the fuel regulator checked, replace the injector o-rings, check fuel pressure and might even need to consider replacing injectors themselves (or having them cleaned).

Sep 05, 2011 | 1994 Pontiac Grand Am

2 Answers

I have a 87 ford ranger 2.9 4+4 replaced both fuel pumps and fuel pump regulator when it sits for over night it looses fuel psi so when i start it in the morning it acts like it has no fuel but after a...


Without seeing it it is a hard thing to diagnose. You could have an injector leaking, possibly a fuel line. Do you smell gas? Sometimes with fords around the fuel filter leaks because of a broken clamp. The o rings around the fuel injectors could be leaking, or one of the rubber fuel lines. If you go off road alot, you could have a pin hole in one of the rubber or metal lines. Check and get back with me and I will do the best I can to help. Hope tis helps.

Jun 08, 2011 | 1987 Ford Ranger

1 Answer

Will start when cold; wont start when hot. Smells of fuel.


you either have a bad fuel regulator or leaking injectors-I'd check the regulator first, remove the vacuum hose and see if there is fuel in the hose-that's it- If it is alright(no fuel in the vacuum hose), you should get new o-rings for your injectors, you could also borrow a fuel pressure tester (auto parts places like Advance loan them out)

Feb 10, 2011 | 2002 Pontiac Grand Prix

1 Answer

Gas line leaking by engine how do repair that?


Where is it leaking? If its at the fuel rail fuel pressure regulator you may need a new regulator if leaking on the metal part. If its leaking at the rail side its just the "O" ring. Relieve fuel pressure(push in valve under plastic cap right side beside alternator on rail. Remove the torx screw holding regulator bracket. Pry out and replace "O" ring, reassemble. If its not the regulator it may be a fuel injector, you need to remove the fuel rail and replace both the upper and lower injector "O" rings. This however needs the intake manifold removed to repair.

Jan 29, 2011 | 2002 Buick LeSabre

1 Answer

Replace fuel inj 2009 lincoln ls 3.9 eng


Check this procedure about V8 3.9L Fuel Injectors - Removal & Installation
  1. Before servicing the vehicle, please familiarize yourself with safety procedures.
  2. Relieve fuel system pressure.
  3. Remove or disconnect the following:
    Negative battery cable Engine appearance covers Fuel lines Fuel pressure regulator Fuel cross over elbow Fuel injector connectors Fuel injector clamping plates Fuel injectors
To install:
  1. Install or connect the following:
    Fuel injectors. Use new O-ring seals. Fuel injector clamping plates Fuel injector connectors Fuel cross over elbow Fuel pressure regulator Fuel lines Engine appearance covers Negative battery cable
  2. Start the engine and check for leaks.

  1. Before servicing the vehicle, please familiarize yourself with safety procedures.
  2. Disconnect the negative battery cable.
    CAUTION The engine appearance cover is equipped with a noise suppressor. If the noise suppressor becomes separated from the engine appearance cover it must be positioned on the intake manifold prior to installing the engine appearance cover.
  3. Remove the engine appearance cover and the noise suppressor, if detached.
  4. Remove the air cleaner outlet pipe.
  5. Release the fuel system pressure.
  6. Remove the four engine appearance cover mounting bracket nuts and the brackets.
  7. Disconnect the fuel pressure sensor electrical connector from the sensor.
  8. Disconnect the fuel pressure sensor vacuum connector from the sensor.
  9. Disconnect the eight fuel injector electrical connectors from the injectors.
  10. Disconnect the fuel temperature sensor electrical connector from the sensor.
  11. Disconnect the fuel supply tube retaining clip from the fuel injection supply manifold.
  12. Disconnect the fuel supply tube spring lock coupling.
  13. Remove the four bolts and the fuel injection supply manifold and fuel injectors as an assembly.
  14. Remove the fuel injectors from the fuel injection supply manifold.
    CAUTION Use O-ring seals that are made of special fuel-resistant material. Use of ordinary O-ring seals can cause the fuel system to leak. Do not reuse the O-ring seals.
  15. Remove and discard the 16 O-ring seals from the fuel injectors.

    zjlimited_467.jpg

    Fig. Exploded view of the fuel injector mounting-3.9L engine shown

To install:
  1. Lubricate the new fuel injector O-ring seals with clean engine oil before installing.
    CAUTION Use O-ring seals that are made of special fuel-resistant material. Use of ordinary O-rings can cause the fuel system to leak. Do not reuse the O-ring seals.
  2. Install sixteen new O-ring seals onto the fuel injectors. Lubricate the O-ring seals with clean engine oil prior to installation.
  3. Install the fuel injectors and clips onto the fuel rail.
  4. Install the fuel rail and injectors as an assembly. Tighten the fuel rail bolts to 89 inch lbs. (10 Nm).
  5. Install the remaining components in the reverse order of removal.

Keep us updated.

Jan 14, 2011 | 2002 Lincoln LS

1 Answer

How do i chage the fuel injector for a geo metro 1997 LSI?


REMOVAL & INSTALLATION Fig. 1: Removing injectors from fuel rail 84245032.gif
Fig. 2: Make sure injectors rotate freely in cylinder head 84245033.gif
  1. Relieve fuel system pressure and disconnect the negative battery cable.
  2. Remove intake air hose between throttle body and intercooler.
  3. Remove accelerator cable.
  4. Unclamp PCV and fuel return hoses from deliver pipe.
  5. Unclamp injector wiring harness.
  6. Disconnect injector coupler.
  7. Remove cold start injector pipe from delivery pipe.
  8. Remove vacuum hose from pressure regulator.
  9. Remove fuel feed hose from delivery pipe.
  10. Remove pressure regulator from delivery pipe.
  11. Remove delivery pipe with injectors.
  12. Remove injectors from delivery pipe. To install:
  13. Replace injector O-rings and lubricate with fuel. NOTE: Make sure injectors rotate smoothly. If not, probable cause is incorrect installation of O-ring.
  14. Check if insulator is scored or damaged. If it is, replace with new one.
  15. Connect delivery pipe with injectors.
  16. Install pressure regulator to delivery pipe using a new O-ring.
  17. Install fuel feed hose to delivery pipe.
  18. Install vacuum and fuel return hoses to pressure regulator and clamp securely.
  19. Install cold start injector pipe to delivery pipe using new gaskets.
  20. Install injector coupler. Clamp injector wiring harness.
  21. Install PCV hose to cylinder head.
  22. Install throttle position sensor coupler.
  23. Install accelerator cable and adjust free-play.
  24. Install intake air hose to throttle body and intercooler.
  25. Connect the negative battery cable.
  26. Start engine and check for leaks.
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Jul 03, 2010 | 1997 Geo Metro

1 Answer

Nissan vanette 2.3d wont start


air lock ,slacken injector pipes ,crank engine and as fuel starts to appear tighten pipes as fuel appears .make sure you prime the injector pump first .great workhorses these motors

Dec 27, 2009 | 1996 Nissan Sentra

1 Answer

92 accord lx leaking on fuel rail


Dont replace just one O ring on the injectors. You need to replace all when you replace them. It sounds like you still have O ring leaks.

Jan 19, 2009 | 1992 Honda Accord

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