What can be the cause of engine vibration?



This is a recently purchased '88TII, which, supposedly, had its engine rebuilt about 5000 miles ago. Vibrates a lot, especially in 1000-3000rpm range, compared to my N/A.



Any clues?

 

Does it only vibrate when you give it gas? It might benefit from some new plugs and wires.

 

does it vibrate during idle. bad motor mounts.....what else is it doing. Be specific.