Ok so this is for my girlfriends car- 99 passat 1.8t, she said she was driving back from school , pulled up to her house put it in park and the engine was shaking awkwardly, so she shut it off and started it again and the check engine light blinked on still with the shaking, turned it off, started it again in the morning and would only turn over with no start, it just kept turning over, so i thoght maybe bad spark plugs , i replaced the plugs, (not the coils) plugs looked good by the way, tried to start it with the same problem...no start just turning over, any clues?