Fuel Pressure: Testing and Inspection
Fuel Pressure TestSpecial Tools Required
- Fuel pressure gauge 07406-004000A
- Fuel pressure gauge attachment set O7AAJ-S6MA150
1. Relieve the fuel pressure.
2. Disconnect the quick-connect fitting (A). Attach the fuel pressure gauge set and the fuel pressure gauge.
3. Start the engine, and let it idle.
- If the engine starts, go to step 5.
- If the engine does not start, go to step 4.
4. Check to see if the fuel pump is running: listen to the fuel fill port with the fuel cap removed. The fuel pump should run for 2 seconds when the ignition switch is first turned on.
- If the pump runs, go to step 5.
- If the pump does not run, do the fuel pump circuit troubleshooting.
5. Read the pressure gauge. The pressure should be 390 - 440 kPa (4.0 - 4.5 kg/sq.cm, 57 - 64 psi)
- If the pressure is OK and the engine is running, the test is complete. If the engine is not running, repair the cause, then continue this test.
- If the pressure is out of specification and the fuel lines are OK, replace the pressure regulator.