Fuel System Pressure Test

PROCEDURE
- Turn engine "OFF" and relieve system pressure.
- Plug THERMAC vacuum port on TBI.
- 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.
- Perform Fuel Pressure Release Procedure and remove fuel pressure gauge.
- Reinstall fuel line.
- "START" engine and check for fuel leaks.
- Remove plug from vacuum port and install air cleaner assembly with new gasket.