Fuel Pump Pressure Test
NOTE:
Begin basic fuel system diagnosis with testing fuel pressure.
- Release fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE
. Attach Fuel Pressure Gauge Set (J-34730-1
) and Adapter (J-35957-1
) to Schrader fitting on fuel rail. Disconnect pressure regulator vacuum hose. Turn ignition on. Allow fuel pump to run for about 2 seconds.
- Fuel system pressure should be about 41-46 psi (2.8-3.2 kg/cm2
). See FUEL PUMP PERFORMANCE
. Start engine and check for leaks. Connect pressure regulator vacuum hose. If engine will not start, fuel pump relay can be by-passed. Also see ENGINE CRANKS BUT WILL NOT RUN
under TROUBLE SHOOTING. With engine idling, fuel pressure should be 25-30 psi (1.8-2.1 kg/cm2
).
FUEL PUMP PERFORMANCE
| Model Application |
Unregulated Pressure psi (kg/cm2
) |
Regulated Pressure psi (kg/cm2
) |
| Rodeo/Passport 3.2L |
41-46 (2.8-3.2) |
25-30 (1.8-2.1) |