Ok this is a follow up on my problem. I've had some help with my vibration in the engine which rattles the whole car, which people have told me is a missfire but no check engine light is on. I checked all the spark plugs except for the one in cylinder #5 because I can't get it out, none of my sockets can grab it, it feels like its stripped or something but its only a few months old so it can't be stripped. Also I've changed my spark wires, no luck. Some people say it could be a bad damper or can the vibration be from loose mounts(engine or tranny)? I'm running out of ideas of what it could be.

 

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