I have a 98 gt that's got a bad engine vibration. Ichecked the motor mounts and they were shot. I replace them and I still have the vibration. The vibration is NOT at all rpms and occursifstationary or being driven.Only thing I can think of is the harmonic balancer or the flywheel. I would guess flywheel before balancer...correct? Anyone have a similiar problem or suggestion?

 

check your firing order. I wrk on boats at a marinia and this one boat rattled like crazy we coulndt figure out what was wrong but we foundtht the wires were on the wrong plugs if the firing order is switched it can throw the engine off causing vibrations.

 

Thanks, but it's only at certain rpms...

 

alright, so check your wires.....