2 - Fuel System Pressure Test

TOOLS REQUIRED
^ SA9127E Gauge Bar Set

This test will determine whether there is adequate fuel pressure delivered to the fuel injectors to start and run the engine under low load conditions.

CAUTION: DO NOT ALLOW SMOKING OR THE USE OF OPEN FLAMES IN THE AREA WHERE WORK ON THE FUEL SYSTEM IS TAKING PLACE. ANYTIME WORK IS BEING DONE ON THE FUEL SYSTEM, DISCONNECT THE NEGATIVE BATTERY CABLE, EXCEPT FOR THOSE TESTS WHERE BATTERY VOLTAGE IS REQUIRED.

1. Remove air induction tube.




2. Relieve fuel system pressure (refer to "Relieving Fuel Pressure").
3. Connect Gauge Bar Set SA9127E and pressure gauge to fuel pressure test port.

IMPORTANT: Battery must be at a minimum of 12 volts when performing any fuel system test. Charge battery before proceeding if below 12 volts.

4. Energize the fuel pump (refer to "Energizing the Fuel Pump") for a minimum of 10 seconds.
4.1 Close valve on fuel gauge pressure adapter.
4.2 Energize fuel pump.
4.3 Record fuel pressure, while fuel pump is energized.
4.4 Relieve fuel pressure.
4.5 Repeat this procedure a minimum of two times.




5. Compare the pressure recorded to the published specification.
6. Return to "Fuel System Diagnosis - Fuel Supply Chart" and use test result to make appropriate decision.