90lum31v6euro Posted September 25, 2003 Report Share Posted September 25, 2003 had a tune up done on my 1990 3.1L lumina, and had a soft rattle from the cat. had a new exhaust system put on (i needed it, the origional factory one was still in use...) and rattle was still there, and now its louder. a shop said it could be a broken flywheel, but the noise sounds like its high up in my engine compartment... almost like something thats loose and clanging around in open space, but mind u, it only rattles when in gear... but does occasionally in park or neutral. when i step on the gas, the rattle goes away... im pulling my hair out here, please help!! Quote Link to comment Share on other sites More sharing options...
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