Fuel Pressure Release
CAUTION:
Fuel system is under high pressure. Release fuel pressure before disconnecting any fuel lines or fuel system 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 the COMPUTER RELEARN PROCEDURES article in the GENERAL INFORMATION section before disconnecting battery.
CAUTION:
DO NOT energize only one injector to relieve fuel pressure. Energize 3 different injectors. Energizing only one injector to relieve all fuel pressure may hydrostatically lock engine. DO NOT ground injector for more than 5 seconds.
- Turn ignition off. Slowly open fuel tank cap to release pressure in tank. Disconnect injector harness connector. Connect a jumper wire between injector connector (injector side) Dark Green/Orange wire and battery positive terminal.
- Connect another jumper wire to injector connector (injector side) White/Light Blue wire. Momentarily ground jumper wire connected to White/Light Blue wire for no more than 5 seconds. Injector No. 1 will energize open, relieving some fuel pressure. Remove jumper wire from White/Light Blue wire.
- Connect a jumper wire to injector connector (injector side) Yellow/White wire. Momentarily ground jumper wire connected to Yellow/White wire for no more than 5 seconds. Injector No. 3 will energize open, relieving some fuel pressure. Remove jumper wire from Yellow/White wire.
- Connect another jumper wire to injector connector (injector side) Gray wire. Momentarily ground jumper wire connected to Gray wire for no more than 5 seconds. Injector No. 5 will energize open, relieving some fuel pressure. Remove jumper wire from Gray wire.
- Remove jumper wire from Dark Green/Orange wire. Energizing 3 different fuel injectors should have relieved enough fuel pressure to safely open fuel system. Use caution when opening fuel system, some residual fuel pressure may be present.