Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

LOW FUEL
1. Using the scan tool, verify that the fuel level is above 15%.
  Is the fuel level above 15%?
  
  Yes
  - Go To 2
  No
  - Add fuel.
  - Go To 2
OTHER DTCS
1. Read the Freeze frame data.
  Is the DTC equal to the freeze frame DTC?
  
  Yes
  - Go To 3
  No
  - Repair any other DTCs first.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
CHECK FOR DAMAGED FUEL LINE
1. Visually inspect the injector supply line for damage.
  Do you have any kinked or bent fuel line?
  
  Yes
  - Replace the damaged fuel line.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
CHECK THE VALVE TRAIN
1. Visually inspect the valve train and check the valve lash on the suspect cylinder.
  Is the valve train functional and the lash within the specifications listed in the service information?
  
  Yes
  - Go To 5
  No
  - Adjust the lash or fix or repair any damaged components.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
CHECK FOR OBSTRUCTED FUEL INJECTOR SUPPLY
1. Remove the fuel injector supply lines for the suspect cylinder.
2. Inspect both ends of the fuel injector supply lines for damage.
3. Using shop air pressure, blow out the fuel injector supply lines to verify that they are not obstructed.
  Are the fuel lines free of debris or damage?
  
  Yes
  - Go To 6
  No
  - Replace the damaged or obstructed fuel injector supply lines in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
CHECK FOR DAMAGED OR OBSTRUCTED HIGH PRESSURE CONNECTOR
1. Remove the high pressure connectors for the suspect cylinder.
2. Inspect both ends of the high pressure connector for signs of damage.
3. Using shop air pressure, blow out the high pressure connector to verify that they are not obstructed.
  Are the high pressure connector free of debris or damage?
  
  Yes
  - Go To 7
  No
  - Replace the damaged or obstructed high pressure connector in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
CHECK THE FUEL INJECTOR AND VALVE COVER HARNESS TERMINALS
1. Turn the ignition off.
2. Visually check the valve cover connectors, wiring, and fuel injector terminals for loose connections or damaged threads.
  Are the connections, wiring, and terminals good?
  
  Yes
  - Go To 8
  No
  - Repair the connections as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
CHECK FOR INTERNAL DAMAGED FUEL INJECTOR
1. With the scan tool, erase DTCs.
2. Switch the misfiring injector and high pressure connector with an injector and high pressure connector from a cylinder that is firing properly.
3. Operate the vehicle.
  Did the misfire DTC follow the suspect injector and high pressure connector?
  
  Yes
  - Replace the internal damaged fuel injector and high pressure connector in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 9
CHECK FOR INTERNAL ENGINE DAMAGE
1. Perform engine compression test.
  Did the suspect cylinder pass the compression test?
  
  Yes
  - Go To 10
  No
  - Repair the internal damage to the engine.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
CHECK FOR INTERNAL ENGINE DAMAGE
1. Perform engine leak down test.
  Did the suspect cylinder pass the leak down test?
  
  Yes
  - Test Complete.
  No
  - Repair the internal damage to the engine.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .