Depressurizing Procedure (1987-88)
WARNING:
Under normal operating conditions fuel injection system is pressurized by a high pressure fuel pump, operating at up to 2.3-2.5 bar (34-37 psi). When engine is stationary this pressure is maintained within system. To prevent pressurized fuel escaping and to avoid personal injury, it is necessary to depressurize fuel injection system before any service operations are carried out.
WARNING:
The spilling of fuel is unavoidable during this operation. Ensure that all necessary precautions are taken to prevent fire and explosion.
NOTE:
If vehicle has not been run there will still be a small amount of residual pressure in fuel line. The depressurizing procedure must still be carried out before disconnecting component within fuel system.
- The fuel pump relay is located under front right hand seat, adjacent to Engine Control Module (ECM). Pull fuel pump relay off its connector. See Fig 1 . Fuel pump relay is mounted on a blue terminal block. Start and run engine.
- When sufficient fuel has been used up causing fuel line pressure to drop, injectors will become inoperative, resulting in engine stall. Switch ignition off. Disconnect battery negative terminal.
- Disconnect either the nut and ferrule at fuel rail or the hose at inlet end of fuel filter.
- To install, install fuel feed hose. Install fuel pump relay and reconnect battery. Crank engine (engine will fire within approximately 6-8 seconds).
NOTE:
Fuel at low pressure will remain in system. To remove this low pressure fuel, place an absorbent cloth around fuel feed hose at fuel rail and release fuel feed hose at appropriate end.