Fuel Pressure

FUEL PRESSURE

WITH ECM
1. Ignition "OFF" for 10 Seconds.
2. With ignition "ON," engine "OFF" and fuel pump running, pressure should be 62-89 kPa (9-13 psi).

WITH PCM AND 4.3, 5.0, 5.7L ENGINE
1. Ignition "OFF" for 10 Seconds.
2. With ignition "ON," engine "OFF" and fuel pump running, pressure should be 62-90 kPa (9-13 psi).
For additional testing procedures,

WITH PCM AND 7.4L ENGINE
1. Ignition "OFF" for 10 Seconds.
2. With ignition "ON," engine "OFF" and fuel pump running, pressure should be 179-220 kPa (26-32 psi).


For additional fuel pressure testing procedures, Related Tests, Information and Procedures