Saturday, March 5, 2011

The fuel composition sensor location on 2002 Chevy tahoe?


Fuel Composition Sensor Replacement

Removal procedure:--

  1. Turn OFF the ignition.
  2. Relieve the fuel pressure.

  3. Object Number: 788907  Size: SH
    Click here for detailed picture of above image.
  4. Raise the vehicle.
  5. Remove the fuel composition sensor fuel composition sensor (FCS) attachment nuts (1).

  6. Object Number: 788908  Size: SH
    Click here for detailed picture of above image.
  7. Disconnect the FCS inlet and outlet pipes from the FCS.

  8. Object Number: 788909  Size: SH
    Click here for detailed picture of above image.
  9. Disconnect the FCS electrical connector (1).
  10. Remove the FCS and bracket assembly from the frame rail.

  11. Object Number: 788910  Size: SH
    Click here for detailed picture of above image.
  12. Remove the FCS bolts and remove from the bracket.
  13. INSTALLATION PROCEDURE:---

    Object Number: 788910  Size: SH
    Click here for detailed picture of above image.

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  1. Install the FCS to the bracket and install bolts.
  2. Tighten
    Tighten bolts to 10 N·m (89 lb in).

  3. Install FCS and bracket assembly to frame.

  4. Object Number: 788907  Size: SH
    Click here for detailed picture of above image.
  5. Install FCS bracket to frame nuts.
  6. Tighten
    Tighten nuts (1) to 17 N·m (13 lb ft).


    Object Number: 788908  Size: SH
    Click here for detailed picture of above image.
  7. Connect the FCS inlet and outlet pipes to the FCS.

  8. Object Number: 788909  Size: SH
    Click here for detailed picture of above image.
  9. Connect the FCS electrical connector (1).
  10. Lower the vehicle.
  11. Start the engine and check for fuel leaks.


Not too difficult.

Just a few bolts, 1 electrical connector, and quick disconnect fuel lines.

Be sure to remove lines carfully. If there is pressure in the fuel system it will spray all over.

Here is a pic to help....

graphic

Well, best way is to have a fuel pressure gauge on it and drain it that way. You can also remove the fuel pump relay while engine running and wait for it to die. That relay is in the underhood fuese block. Labled fuel pump or FP.

There will still be some pressure, but not as much.

Either way, there will be fuel leakage, even if all pressure relieved.


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