My car is misfiring on an unknown cylinder.
Hello, since the car is misfiring there is probably a Check Engine Light that goes along with it. A simple code reader can give you the code associated with that cylinder that is missing. The next step is a little more involved, which is finding the cause of the misfire. To narrow down the misfire, this would require testing of the ignition system which consists of the coil, spark plug, and high voltage system. If the ignition system is okay, then the fuel injector will need to be checked. You may need the aid of a mechanic to check for codes and data, and perform any testing as needed to properly diagnose your engine misfire.
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