Fuel Pressure: Testing and Inspection

1. Relieve fuel pressure.
2. Remove the Service Bolt on the Fuel Rail while holding the Banjo Bolt with another wrench. Attach the Fuel Pressure Gauge.





3. Start the Engine. (If the Engine will not start, turn the Ignition Switch on, wait for two seconds, turn it off, then back on again and read the Fuel Pressure). Measure the fuel pressure with the Engine idling and the Vacuum Hose of the Fuel Pressure Regulator disconnected from the Fuel Pressure Regulator and pinched.

Pressure should Be:
230-280 kPa (2.3 - 2.8 kg/cm2, 33 - 40 psi).

4. Reconnect Vacuum Hose to the Fuel Pressure Regulator.

Pressure should Be:
170 - 220 kPa (1.7 - 2.2 kg/cm2, 24 - 31 psi).

If the fuel pressure is not as specified, first check the Fuel Pump. If the Fuel Pump is OK, check the following:
- If the fuel pressure is higher than specified, inspect for:
Pinched or clogged Fuel Return Hose or Line.
Faulty Fuel Pressure Regulator.

- If the fuel pressure is lower than specified, inspect for:
Clogged Fuel Filter.
Faulty Fuel Pressure Regulator.
Leakage in the Fuel Pipes or Hoses.