its a kade. we pulled out the spark plugs hooked them up to the wires. when we started the car we got spark out of both of them. i checked my chiltons manual and they are all in the right place. if it does have something to do with my previous problems then that was damn good timing. because i was driving my car all day without a problem until we messed with it. and no the vibration does not change when we pull them out. so i think its just not igniting in the last to valves.