Q: Engine vibration

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I recently replaced the 4 ignition coils and since doing so the engine is vibrating a little.

My car has 122000 miles.
My car has an automatic transmission.

Hello, thanks for writing in about your Volkswagen Passat. You should scan the engine computer to see if you are getting a misfire code for one of the cylinders. From what you’ve described you may have a defective coil or fouled spark plug. You should also note any oil in the spark plug holes indicating a valve cover leak as this will also cause a misfire. If you’re unable to pinpoint the issue, have the engine vibration diagnosed at your home or office by one of our mobile technicians.

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