Circuit/System Verification

IMPORTANT:

Inspect the fuel system for damage or external leaks before proceeding.
Verify that adequate fuel is in the fuel tank before proceeding.
The fuel pump relay may need to be commanded ON a few times in order to obtain the highest possible fuel pressure.

Ignition ON, command the fuel pump relay ON with a scan tool. You should hear the fuel pump turn ON and OFF.
- If the fuel pump does not turn ON, refer to Fuel Pump Electrical Circuit Diagnosis .
Ignition OFF, all accessories OFF, install the J 34730-1A . Refer to Fuel Pressure Gage Installation and Removal .
Ignition ON, command the fuel pump relay ON with a scan tool. Verify the fuel pressure is between 380-427 kPa (55-62 psi) and remains steady for 5 minutes.