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hey tru2chevy i see the mercerville motorsports in you sig are you a mechanic? cuz i have little issue i think with my ls1 some vacum line or something , it idles rough when im in drive at a stop or in park it dips down to 500 and then back up to 1000 , with no check engine light and runs perfect otherwise. I was just asking because im very weiry of letting reg mechanics work on my car
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