1990 gsx galant

[jcuellar]

I have a question for anybody who can answer it. My 1990 gsx galant is making a vibrating noise when the rpms go over 3 or 4 in 1-3 gear. someone told me it could be the manifold...(exhaust or intake manifold i have no idea which). And i'm wondering if this could be the problem. once i hit 4 and 5 gear the car run great but below that it just runs like crap. If anybody can answer my question please let me know.

[manybrews]

probably a timing belt issue. You more than likely have a balance shaft out of time, or a have a broken "b" belt.
have it checked IMMEADIATLY. If your about to toss a timing belt, you will destroy your engine.

[JF]

check your engine mounts too......i had two busted ones and almost the same problem....does it feel like it is gonna shake apart when you are at a stop?

[ConceptSleeper]

mine was doing the same, it was the transmission(automatic) havent fixed it yet