Great instructions. I have a 2008 Mini Cooper base that had poor idol for months, rough to start sometimes stalling out right after starting and stalling out when stopping in traffic. Accelerating was also difficult, where if I would hit the gas too quickly it would hesitate and sputter and stall out if I kept my foot on the gas to accelerate more quickly. I went too long without fixing it, now my car won't start. The engine tries very hard to turn over, as if it's just about there, rumbling, then it stalls. I originally thought this was an engine solenoid issue, as the exact same thing happened before and replacing the solenoids fixed it, so I replaced them again and the car still isn't starting. It's throwing an engine fault code P0304, cyl 4 misfire. Switching the coils doesn't change the fault code. Could this still be a ignition coil/spark plug issue, or something else?

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This post was auto-generated based upon a question asked on our tech article page here: Pelican Technical Article: MINI Cooper - Spark Plug and Cable Replacement

Could be a bad cylinder. I would check spark, fuel and compression on all cylinders.

- Nick