Test Description
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers in the diagnostic procedures.
- 3
If the engine starts, there is adequate fuel pressure. A restriction in a fuel line or a sensor fault exists. - 7
If the FRP is above 23 MPa, there is adequate pressure at this time. - 8
An open in the FRP sensor circuit will cause the ECM to show the maximum reading of over 175 MPa. - 9
If the engine starts, the problem is a faulty fuel rail pressure sensor.