CNG - Gasoline

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 .

WARNING:

The fuel system is under constant pressure even with engine off. Before servicing the fuel rail, fuel system pressure must be released.

Perform the CNG line purge. Refer to FUEL TUBE PURGING - CNG .
Perform the fuel system pressure release procedure. Refer to FUEL SYSTEM PRESSURE RELEASE .
Remove the negative battery cable.

Fig 1: Clean Air Tube, IAT Sensor Electrical Connector & Air Cleaner Housing
Courtesy of CHRYSLER GROUP, LLC
Disconnect the IAT sensor electrical connector (2).
Remove the clean air tube (1) and the air filter cover (3) as an assembly from the throttle body.
CAUTION:
The left and right fuel rails are replaced as an assembly. Do not attempt to separate the fuel rail halves at the connector tube. Due to the design of the connector tube, it does not use any clamps. Never attempt to install a clamping device of any kind to the connector tube. When removing the fuel rail assembly for any reason, be careful not to bend or kink the connector tube.

Fig 2: Removing/Installing Fuel Injector Connector
Courtesy of CHRYSLER GROUP, LLC

NOTE:

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. Push the slider away from the injector (1) while pushing slider, depress tab (2) and remove the electrical connector (3) from the injector.

Fig 3: PCV Hose & Fuel Line Quick Connect Fitting
Courtesy of CHRYSLER GROUP, LLC
Disconnect the breather air hose (3) and position aside.
Disconnect the PCV hose (1) and position aside.

Fig 4: 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 CNG fuel rail mounting bolts (3) from both the left and right fuel rails (2).
Using a side to side motion, gently rock the left fuel rail while pulling up until all four left side fuel injectors just start to clear the machined holes in the intake manifold.

Fig 5: PCV Hose & Fuel Line Quick Connect Fitting
Courtesy of CHRYSLER GROUP, LLC
Disconnect the gasoline fuel line quick connect fitting (2) at the fuel rail Refer to FITTING, QUICK CONNECT .
Remove the four fuel rail mounting bolts (4) from both the left and right fuel rails.
Using a side to side motion, gently rock the right fuel rail 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.
If the fuel injectors are to be removed from the fuel rail Refer to REMOVAL .