i bought a 94 gt that had an engine vibration. It starts out at idle being barely noticeable, but gets worse as rpms rise. I also notice that the car will accelerate, but not like it should. Feels down on power. I took it to 100 mph in 3rd gear and it seemed to struggle. Also, let me point out that is it a manual transmission that looks to have had some work done to it recently as the tranny looks like it was dipped, cleaned and repainted. I also should note that i changed the harmonic balancer as well.