Question about 1993 Jeep Grand Cherokee

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Fuel dripping from fuel rail. How to change o-rings

How to change the fuel injectors o-rings?

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It is pretty standard on most vehicles it just depends on how many O-rings here is a picture an O ring on an injector. You can take a pick tool to remove the ring. The injectors should come out with some type of clip.

You can use the below just - the changing of the injectors. :)

Step1 Determine which fuel injector your Jeep Grand Cherokee will need. This depends not only on the make and model, but also the engine size. Models made from 1999 to 2004 may be equipped with a 2.7L OM647, 3.1L 531, 4.0L PowerTech, or 4.7L PowerTech engine. Models made after this date can have a 3.0L OM642, 3.7L PowerTech, 4.7L PowerTech, 5.7L Hemi or 6.1L Hemi. Step2 Relieve fuel system pressure and disconnect the negative battery cable with a socket wrench. Remove the air intake assembly and unplug the electrical connectors for the alternator. Step3 Detach the fuel lines from the fuel injectors. Remove the vacuum hoses and electrical connectors from the throttle body with a socket wrench. Step4 Unplug the electrical connectors for the fuel injectors, manifold absolute pressure sensor and intake air temperature sensor. Disconnect the ignition coils and mounting bolts for the fuel supply manifold with a socket wrench. This will allow you to remove the manifold with the injectors still attached. Discard the old O-rings. Step5 Install the new fuel injectors by reversing the removal procedure. Use a torque wrench to tighten the mounting bolts for the fuel supply manifold to 20 foot pounds. Step6 Start the engine and check for leaks.

Posted on Jan 09, 2009

  • Rob Houg
    Rob Houg Jan 09, 2009

    Here is a link to an even better explanation. I have to attach the link because it is quite lengthy.

    Replacing o-RINGS


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My 2000 ford expedition fuel injectors are spitting out gas after I changed spark plugs on the 5,6,7,8 cylinder side. I tried to make sure all the lines were pushed down secure before tightening the...


If the fuel rail is not seated down where it was this will happen. I put some lubricant on the o-rings to make sure the injectors fit in the rail all the way, try twisting the injectors also while the rail is pushed down. Also you might need to change the o-rings on the top of the injectors. I hope this helped you.

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How do i replace fuel rail in 96 grand am 3100


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I need to replace the #2 fuel injector. Is this something a layman such as I can accomplish?


You could do it, but remember gasoline is flammable and volatile and can be hazardous to work with: REMOVAL AND INSTALLATION 1.9L Engines
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Properly relieve the fuel system pressure.
  3. Remove or disconnect the following:
    • Negative battery cable
    • Fuel rail
    • Fuel injector retaining clip off the injector
    • Fuel injector
    • Fuel injector O-rings and discard them Fig. 1: Fuel injector identification-1.9L engine 9306zg58.gif
    To install: NOTE: The SOHC and DOHC fuel injectors are not interchangeable. The injectors are identified by a color coded plastic ring near the bottom of the injector. The SOHC injector has a blue ring near the O-ring that mates to the intake manifold and the DOHC has a pink ring.
  4. Lubricate the new fuel injector O-ring with clean engine oil.
  5. Install or connect the following:
    • New O-ring seals on the fuel injector
    • Retaining clip to the fuel injector
    • Fuel injector to the fuel rail
    • Fuel rail
    • Negative battery cable
  6. Start the vehicle and check for leaks, repair if necessary.
2.2L and 3.0L Engines
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Properly relieve the fuel system pressure.
  3. Remove or disconnect the following:
    • Negative battery cable
    • Fuel rail
    • Fuel injector retaining clip off the injector
    • Fuel injector
    • Fuel injector O-rings and discard them
Fig. 2: Remove the retainer clip from the fuel injector - 2.2L and 3.0L engines 9306zg59.gif
To install:
  1. Lubricate the new fuel injector O-ring with clean engine oil.
  2. Install or connect the following:
    • New O-ring seals on the fuel injector
    • Retaining clip to the fuel injector
    • Fuel injector to the fuel rail
    • Fuel rail
    • Negative battery cable
  3. Start the vehicle and check for leaks, repair if necessary.
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Feb 14, 2011 | 1999 Saturn SL

1 Answer

2005 expedition 5.4 bank 1 too rich, cylinder 1 misfire, o2 sensor 1 error, I changed o2 sensor,spark plug & coil but engine is still smoking,raw fuel, doesn't seem to be firing on bank 1


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1 Answer

I have fuel leaking from the fuel rail at the 2nd injector from the front. The leak seems to be coming from where the metal of the fuel rail conects to the plastic....


Maybe an O-ring is leaking. Try a new injector that comes with an o-ring to be sure it's not the injector itself.
Fuel Injector - for V8

REMOVAL & INSTALLATION


  1. Before servicing the vehicle, refer to the precautions in the beginning of
    this section.
  2. Relieve fuel system pressure.
  3. Remove or disconnect the following:

    • Negative battery cable
    • Fuel rail
    • Fuel injector retaining clips
    • Fuel injectors

    To install:

  4. Install or connect the following:

    • Fuel injectors, using new O-rings
    • Fuel injector clips to the fuel rail
    • Fuel rail
    • Negative battery cable

  5. Start the vehicle and check for leaks, repair if necessary.

Oct 30, 2010 | 2002 Jeep Grand Cherokee

2 Answers

After removing the fuel injectors and rail to remove the manifold, how do you reinstall the fuel injectors?


the same way you took it apart. put a little grease around the rubber seals so they will slide in easier. just tap on the fuel rail while lightly tapping it into place.

Mar 28, 2010 | 2002 Honda Passport

1 Answer

Serious miss, almost like dropped cylinder, No


I don't know what year your ford is but most of them have the injectors mounted externally. There not bad at all to do. Vehicle off, release fuel-line pressure, remove the bolts holding down fuel rail, pull the injector/s out of the head, lap injector o-ring with motor oil, install new injector/s into head. lap top o-ring with motor oil, install fuel rail, start vehicle, and check for leaks. If you are only replacing a few injectors do buy new injector o-rings for the other injectors. You will not be able to push the fuel-rail back onto the injectors without replacing them (they will be swolen).

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1998 Audi A4 1.8l


Nope - pretty much every system I've seen requires removal of the rail and all injectors as a unit, and then individual disassembly of the injectors. Honestly, with an 11-model-year-old car, if you're going to remove that injector (which, by your other post, you don't have a choice), it's worth the time and relatively low cost to replace all of your O-rings for peace of mind. You can soak the rail and injectors with penetrating oil to help free them up, and then clean and dry the rail and ring seating surfaces before installing the new O rings and injectors. You're going to enough trouble as it is - might as well be thorough and handle any future fuel leakage now before it's an issue and requires another removal of the rail.

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