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3. CHECKING THE FUEL PUMP INLET Turn the ignition off. WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or ser- Is the Fuel Inlet Strainer plugged? Yes >> Repair/Replace as necessary. Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Replace the Fuel Pump Module. Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 4. FUEL PUMP MODULE NOTE: Before continuing visually and physically inspect the fuel delivery system for external leaks or dam- WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or ser- 9 ) or #6631 (3/8 9 ) fuel line adapter. Install the fuel pressure gauge. Start the engine and allow the fuel system to reach maximum pressure. Turn the ignition off. NOTE: Fuel specification is 407 KPa +/- 34 KPa (59 psi +/- 5 psi). Monitor the fuel pressure gauge for a minimum of 5 minutes. NOTE: The pressure should not fall below 241 KPa (35 psi). Does the fuel pressure drop below 241 KPa (35 psi)? Yes >> Replace Fuel Pump Module. Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go to 5 5. FUEL INJECTOR(S) WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or ser- Start the engine and allow the fuel system to reach maximum pressure. Turn the ignition off. NOTE: Fuel specification is 407 KPa +/- 34 KPa (59 psi +/- 5 psi). Monitor the fuel pressure gauge for a minimum of 5 minutes. PM ENGINE ELECTRICAL DIAGNOSTICS - GPEC 9 - 923 |