[Peter Zimmermann]

Take a good picture of the left and right sides of the inside of the engine compartment. It's very possible that your car has been rear-ended, has a damaged frame rail, and when repaired wasn't done correctly. What I need to see is the rubber seal/engine tin area below the spark plug wires... A sure give-away is if you can see the road below one side (between the edge of the rubber seal and the engine tin), and find that the engine tin is tucked in under the frame rail rubber on the other side.