Fuel Composition Sensor Replacement
Removal procedure:--
- Turn OFF the ignition.
- Relieve the fuel pressure.
- Raise the vehicle.
- Remove the fuel composition sensor fuel composition sensor (FCS) attachment nuts (1).
- Disconnect the FCS inlet and outlet pipes from the FCS.
- Disconnect the FCS electrical connector (1).
- Remove the FCS and bracket assembly from the frame rail.
- Remove the FCS bolts and remove from the bracket.
- INSTALLATION PROCEDURE:---
- Install the FCS to the bracket and install bolts.
- Install FCS and bracket assembly to frame.
- Install FCS bracket to frame nuts.
- Connect the FCS inlet and outlet pipes to the FCS.
- Connect the FCS electrical connector (1).
- Lower the vehicle.
- Start the engine and check for fuel leaks.
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.
Tighten
Tighten bolts to 10 N·m (89 lb in).
Tighten
Tighten nuts (1) to 17 N·m (13 lb ft).
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....
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.
