I dropped my wifes f4 off at the dealer for some recall work and oil consumption test (she drives alot) the next day she said it shook when she tried to start it after it had been sitting over night or for a few hours. It shook all over the place and was loud and violent. After a few minutes it seemed to shake less and stop shaking at idle once it was warmed up. Do you think it could be something as simple as a ignition coil or intake leak?
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