Cool, you should look into a nice tuneup because it more than likely needs one anyhow. If that doesnt fix the engine vibrations it may be more serious like a mount or perhaps just just bad timing or AAC valve I believe it is. Also, if its a bad vibration at all times except for when under load, check to make sure all spark plugs are sparking. Come to think of it when one cylinder isnt firing or getting enough spark, thats what will happen. Check that first.
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