most common cause of a misfire

Question

It just happened it was running fine and all of a sudden service engine light came on and the car started to run rough.

Answer 1

• Spark plugs
• Ignition Coils
• Clogged fuel injectors
• Stuck Intake valve timing control solenoid valve

First thing you need to do is check what code is stored in the Engine Control Module (ECM). The code will give you a better idea what the problem is.