Fuel Pressure Release
WARNING:
Always relieve 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 section before disconnecting battery.
- Disconnect negative battery cable. Slowly loosen fuel tank filler cap to release fuel tank pressure. Remove protective cap from pressure test port on fuel rail. See Fig 1 .
- Using Fuel Pressure Gauge Set (5069), obtain Fuel Pressure Gauge and Hose Assembly (C-4799-A). Remove gauge from hose. Place gauge end of hose in approved gasoline container. Position shop towels to soak up any spilled fuel. Connect other end of fuel pressure release hose to fuel pressure test port. Fuel pressure will bleed off through hose into gas container. Remove fuel pressure release hose and install cap over test port. Reconnect negative battery cable.