Hello team,

My name is Juan Vela, I have a 2008 Dodge Challenger 6.1L, SRT8, the car is showing the check engine light and the diagnostic is miss fire on cylinder 5, I changed already the spark plugs, the coils and the fuel injectors, I ran out of options already, still have the light. If someone can send me some pointers on what could be wrong with my car will be greatly appreciated. Thank you in advance.

 

An engine needs air, fuel, spark and compression to run. You've already replaced components in both the ignition system and fuel system. However, simply replacing those component does not guarantee proper operation without testing but for now I'll keep it simple and say the next step should be a compression test.



Tip: A cheaper initial test would have been to try swapping cylinder 5's coil pack and spark plug with a different cylinder to see if the problem moved to a different cylinder.

 

Also... After the repair did you clear all the codes and clear the system?
Is the miss still present? OR is the light just still on?
If you have done all the above items, and the miss is still present, then performe the compression test as recommened below....
Cheers