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Home >> Chevrolet >> 1994 >> G 30 Van V8-454 7.4L >> Repair and Diagnosis >> Powertrain Management >> Tune-up and Engine Performance Checks >> Fuel Pressure >> Testing and Inspection
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Fuel Pressure: Testing and Inspection

PROCEDURE:

A fuel system pressure test is part of several of the diagnostic charts and symptom checks. To perform this test, follow this procedure:

- Turn engine "OFF" and relieve fuel system pressure.
- Disconnect the negative battery terminal.
- Install fuel pressure gauge (J 29658 or equivalent) on the outlet side of the fuel filter.
- Tighten gauge in line to insure no leaks occur during testing.
- Connect the negative battery terminal.
- "START" engine and observe fuel pressure reading. It should be 179-220 kPa (26-32 psi).
- Disconnect the negative battery terminal.
- Relieve fuel pressure remove fuel pressure gauge.
- Install a new O-ring on fuel feed line.
- Reinstall fuel line.
- Connect the negative battery terminal.
- "START" engine and check for fuel leaks.
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