EFI Engines

CAUTION
Fuel supply lines on 4.9L EFI, 5.0L EFI, 5.8L EFI and 7.5L EFI engines will remain pressurized for some period of time after the engine is shut off. This pressure must be relieved before servicing of the fuel system.

Before opening the fuel system on vehicles with EFI engines, relieve fuel pressure as follows:

1. Locate and disconnect the electrical connection to either the fuel pump relay, the inertia switch or the in-line high pressure fuel pump.

2. Crank engine for approximately ten seconds.

NOTE:
Engine may start and run for a short time. If so, crank engine an additional five seconds after engine stalls.

3. Connect the electrical connector that was disconnected in Step 1.

4. Disconnect battery ground cable.

5. Raise vehicle on hoist. Refer to the appropriate model year Volume F Pre-Delivery Shop Manual, Section 50-04, Hoisting and Jacking.