Car has been running rough and misfiring, replaced plugs, etc. no change. Suspecting fuel problems i put in some injector cleaner and cleaned the throttle, car started running better but still very rough. Brought to a garage and they initially thought it was a bad fuel injector but they are now saying that cylinder has very low compression. He is still researching and has not determined the problem. Still think it was fuel related, any chance I damaged the cylinder driving to the garage. The car only has 50K miles. Any ideas on this one?