Over the last 4 months I have been replacing the ignition coils at one per month. I should have replaced them all at once and saved time. The symptom each time would be a hiccup in the engine at idle that would progressively get worse to where the engine ran rough. The engine light eventually came on so I knew what to replace and the problem stopped until the next month when the next coil went bad.A similar symptom of the engine hiccup started again last week. I decided to replace the last two ignition coils to be done with the problem, but the hiccup is still there. I checked to ensure that I had hooked everything up correctly.
The hiccup is only noticeable when engine is cold at this point. It is very infrequent and random. The engine light has not come on so there are no codes.
Saturday, January 12th, 2013 AT 6:12 PM