V6 Fuel Pressure Release
WARNING:
Always release fuel pressure before disconnecting any fuel injection-related component. DO NOT allow fuel to contact engine or electrical components.
CAUTION:
When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.
- Remove fuel pump relay. Fuel pump relay is located in power distribution center at driver's side front corner of engine compartment, just in front of strut tower. See Fig 1.
- Start engine and allow engine to idle until engine stalls. Attempt to restart engine until engine will no longer run. Turn ignition off.CAUTION: Ensure steps 1) and 2) are performed before proceeding. These steps must be performed to ensure most of the fuel pressure is released from fuel rails to prevent an excessive amount of fuel being delivered into the cylinders.
- Remaining fuel pressure is released by energizing fuel injector. Disconnect electrical connector at any fuel injector.
- Connect jumper wire between one electrical terminal on fuel injector and positive battery terminal. Connect another jumper wire on remaining electrical terminal on fuel injector.CAUTION: DO NOT apply battery voltage to fuel injector for extended periods, or fuel injector may be damaged.
- Momentarily touch remaining end of jumper wire to negative battery terminal in short intervals to energize fuel injector and release remaining fuel pressure.
- Remove jumper wires. Reinstall electrical connector and fuel pump relay. Fuel system components may now be serviced. Cover fuel lines with shop towel before disconnecting, as some residual fuel pressure may exist.
- Diagnostic Trouble Code (DTCs) may have been stored in Powertrain Control Module (PCM) due to the removal of fuel pump relay. Using scan tool, clear DTCs from PCM. See TESTS W/CODES - 2.7L article for clearing of DTCs.