Fuel Pump Pressure (PFI Systems)
NOTE:
For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS
article.
- On 2.2L & 2.2L Turbo models, relieve fuel line pressure by disconnecting fuel pump relay and starting engine. After engine stalls, turn ignition off. Reconnect fuel pump relay.
- On all other models, remove fuel tank cap. Using Fuel Pressure Gauge (T80L-9974-B), release pressure from system at pressure relief valve (Schrader valve) on fuel injection manifold rail.
- The fuel pump may be activated by grounding the fuel pump lead at the SELF-TEST connector. Use a jumper lead and ground the "FP" terminal with the ignition on. This activates the fuel pump. See Fig 1 . For additional circuit test information, see appropriate TESTS W/CODES article in this section.