Fuel Delivery: Rail-Fuel: Removal: 4.7L

WARNING: The fuel system is under constant pressure even with engine off. Before servicing fuel rail, fuel system pressure must be released. (Refer to FUEL SYSTEM PRESSURE RELEASE) .

CAUTION: The left and right fuel rails are replaced as an assembly. Do not attempt to separate rail halves at connector tubes. Due to design of tubes, it does not use any clamps. Never attempt to install a clamping device of any kind to tubes. When removing fuel rail assembly for any reason, be careful not to bend or kink tubes.

Fig 1: Remove/Install Injector Connector

Courtesy of DAIMLERCHRYSLER CORP.

Remove fuel tank filler tube cap.
Perform Fuel System Pressure Release Procedure. (Refer to FUEL SYSTEM PRESSURE RELEASE) .
Remove negative battery cable at battery.
Remove air duct at throttle body air box.
Remove air box at throttle body.
Remove air resonator mounting bracket at front of throttle body (2 bolts).
Disconnect fuel line latch clip and fuel line at fuel rail. See Fig 1. A tool will be necessary for fuel line disconnection. (Refer to FUEL SYSTEM/FUEL DELIVERY/QUICK CONNECT FITTING - STANDARD PROCEDURE) .
Remove necessary vacuum lines at throttle body.
Disconnect electrical connectors at all 8 fuel injectors. Refer to graphic. Push red colored slider away from injector (1). While pushing slider, depress tab (2) and remove connector (3) from injector. The factory fuel injection wiring harness is numerically tagged (INJ 1, INJ 2, etc.) for injector position identification. If harness is not tagged, note wiring location before removal.
Disconnect electrical connectors at all throttle body sensors.

Remove 8 ignition coils. (Refer to ELECTRICAL/IGNITION CONTROL/IGNITION COIL - REMOVAL) .

Fig 2: Fuel Rail Remove/Install - 4.7L V-8

Courtesy of DAIMLERCHRYSLER CORP.

1 - MOUNTING BOLTS (4)

2 - INJECTOR.#7

3 - INJECTOR.#5

4 - QUICK-CONNECT FITTING

5 - INJECTOR #3

6 - FUEL INJECTOR RAIL

7 - INJECTOR.#1

8 - CONNECTOR TUBE

9 - INJECTOR.#2

10 - INJECTOR.#4

11 - INJECTOR.#6

12 - INJECTOR.#8

13 - PRESSURE TEST PORT CAP

Remove 4 fuel rail mounting bolts (1). See Fig 2.
Gently rock and pull left side of fuel rail until fuel injectors just start to clear machined holes in cylinder head. Gently rock and pull right side of rail until injectors just start to clear cylinder head holes. Repeat this procedure (left/right) until all injectors have cleared cylinder head holes.
Remove fuel rail (with injectors attached) from engine.
If fuel injectors are to be removed, (Refer to FUEL SYSTEM/FUEL INJECTION/FUEL INJECTOR - REMOVAL) .