Grand Cherokee 4WD V8-4.7L Flex Fuel (2009)
Fuel Pressure Release: Service and Repair
FUEL SYSTEM PRESSURE RELEASE
Use the following procedure if the fuel injector rail is, or is not equipped with a fuel pressure test port.
1. Remove the fuel fill cap.
2. Remove the fuel pump relay from the Power Distribution Center (PDC). For location of the fuel pump relay, refer to label on the underside of the
PDC cover or See: Maintenance/Fuses and Circuit Breakers/Fuse/Locations
3. Start and run the engine until it stalls.
4. Attempt restarting the engine until it will no longer run.
5. Turn the ignition key to the OFF position.
6. Place a rag or towel below the fuel line quick-connect fitting at the fuel rail.
7. Disconnect the quick-connect fitting at the fuel rail See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Line Coupler/Service and
Repair
8. Return fuel pump relay to PDC.
NOTE: One or more Diagnostic Trouble Codes (DTC) may have been stored in the PCM memory due to fuel pump relay removal. A
diagnostic scan tool must be used to erase a DTC.
