2. Fuel Pressure
WARNING:
THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE EVEN WITH THE ENGINE OFF. BEFORE TESTING OR SERVICING ANY FUEL SYSTEM HOSE, FITTING OR LINE, THE FUEL SYSTEM PRESSURE MUST BE RELEASED.
Turn the ignition off.
Install a fuel pressure gauge at the engine.
Turn the ignition on.
With the DRB III(R), actuate the Fuel Pump Relay and observe the fuel pressure gauge.
NOTE:
Fuel pressure specification is 3.7 to 4.2 bar (54 to 61 psi).
Stop All Actuations.
Choose a conclusion that best matches your fuel pressure reading.
Below Specification
Go To 3
Within Specification
Test Complete.
Above Specification
- Replace the fuel filter/fuel pressure regulator. See FUEL SYSTEM article.