Rail, Fuel: Removal: CNG

WARNING: This page is about a different car, the 2012 RAM Pickup and 2012 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Refer to WARNING .

NOTE:

Clean the top side of the engine area so that no debris can enter the open ports of the throttle body or the fuel injectors.

Fig 1: Clean Air Tube, IAT Sensor Electrical Connector & Air Cleaner Housing

Courtesy of CHRYSLER GROUP, LLC

Perform the CNG fuel line purge and gasoline fuel system pressure release. Refer to FUEL TUBE PURGING - CNG and FUEL SYSTEM PRESSURE RELEASE .
Disconnect the battery negative cable.
Disconnect the IAT sensor electrical connector (2).
Remove the clean air tube (1) and the air cleaner housing cover (3) as an assembly at the throttle body. The factory fuel injection electrical harness is numerically tagged (INJ 1, INJ 2, etc.) for injector position identification. If the electrical harness is not tagged, note the injector position before electrical harness removal.
Disconnect the electrical connectors at all sixteen fuel injectors. For the CNG injectors, require pressing in the tang to remove. For the gasoline, push the slider away from the injector (1) while pushing slider, depress tab (2) and remove the electrical connector (3) from the injector.

Fig 2: PCV Hose & Fuel Line Quick Connect Fitting
Courtesy of CHRYSLER GROUP, LLC
Remove the breather hose (3) at the oil fill housing and position aside.
Disconnect the PCV hose (1) and position aside to gain access to the fuel rail.
WARNING:
The fuel system is under constant pressure even with engine off. Before servicing the fuel rail, fuel system pressure must be released.

Fig 3: CNG Fuel Rail Pressure Sensor, Fuel Rail & Fuel Supply Line
Courtesy of CHRYSLER GROUP, LLC
Disconnect the fuel rail sensor electrical connector (1).
Remove the CNG fuel supply line at the fuel rail (4).
Remove the four fuel rail mounting bolts (3) from both the left and right fuel rails.
Using a side to side motion, gently rock the right fuel rail (2) while pulling up until all four right side fuel injectors just start to clear the machined holes in the intake manifold.
NOTE:
Make sure the O-rings are still attached to the fuel injectors during removal.
Remove the left and right fuel rails (with injectors attached) as an assembly from the engine.
NOTE:
If the same fuel injectors are to be reinstalled, install new O-rings.

Fig 4: Fuel Rail, Injectors & Fasteners
Courtesy of CHRYSLER GROUP, LLC
If the fuel injectors (4) are to be removed from the fuel rail (1) Refer to REMOVAL .