RAM 1500 Truck 4WD V8-4.7L (2008)
Fuel Pressure Release: Service and Repair
STANDARD PROCEDURE - FUEL SYSTEM PRESSURE RELEASE
Use following procedure if the fuel injector rail is, or is not equipped with a fuel pressure test port.
A separate fuel pump relay is no longer used. A circuit within the TIPM (Totally Integrated Power Module) is used to control the electric fuel
pump located within the fuel pump module. The TIPM (1) is located in the engine compartment in front of the battery.
1. Remove fuel fill cap.
2. On bottom of vehicle, disconnect fuel pump module electrical connector. This can be accomplished at either of the two connectors (1) or (2).
3. Start and run engine until it stalls.
4. Attempt restarting engine until it will no longer run.
5. Turn ignition key to OFF position.
6. Place a rag or towel below fuel line quick-connect fitting at fuel rail.
7. Disconnect quick-connect fitting at fuel rail.
8. Reconnect fuel pump module electrical connector on bottom of vehicle.
9. One or more Diagnostic Trouble Codes (DTC's) may have been stored in PCM memory due to disconnecting fuel pump module circuit. A
diagnostic scan tool must be used to erase a DTC.
