*FUEL PRESSURE LEAK DOWN

For a complete wiring diagram Refer to Section 8W.

Possible Causes

FAULTY FUEL PUMP MODULE

FUEL INJECTOR(S)

Diagnostic Test

1.FUEL PUMP MODULE

NOTE: Before continuing visually and physically inspect the fuel delivery system for external leaks or damage. Repair / replace as necessary.

WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or servicing any fuel system hose, fitting or line, the fuel system pressure must be released. Failure to follow these instructions can result in personal injury or death.

NOTE: Fuel specification is 407 kPa +/- 34 kPa (59 psi +/- 5 psi).

NOTE: The pressure should not fall below 241 kPa (35 psi)

Does the fuel pressure drop?

Yes

Replace Fuel Pump Module.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Go To 2

2.FUEL INJECTOR(S)

NOTE: Fuel specification is 407 kPa +/- 34 kPa (59 psi +/- 5 psi).

NOTE: The pressure should not fall below 241 kPa (35 psi)

Does the fuel pressure drop?

Yes

Replace the leaking fuel injectors.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Test Complete.