Fuel Pressure: Testing and Inspection

Fuel Supply System TBI:

PROCEDURE
- Turn engine "OFF" and relieve system pressure. Refer to FUEL PRESSURE RELIEF.
- Uncouple fuel supply flexible hose in engine compartment. Install fuel pressure gauge between steel line and flexible hose.
- Tighten gauge in line to insure no leaks occur during testing.
- "START" engine and observe fuel pressure reading. It should be 62-90 kPa (9-13 psi).
- Gradually restrict (pinch) outlet side of gauge. Fuel pressure should rise to 90 to 103 kPa (13 to 15 psi). This checks maximum pressure (dead head pressure) and determines if high fuel pressure is due to a restricted fuel return line or a TBI pressure regulator problem.
- Relieve fuel pressure remove fuel pressure gauge.
- Reinstall fuel line.
- "START" engine and check for fuel leaks.