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Laggy Throttle and unstable idle 3.4


gpchris

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Its not really that bad but when I rev the engine it takes less than a second to actually rev.. Its response is alot later than my 3.1. Also it before it had time to heat up the idle is unstable it does up and down no more than 400 rpm but somethings got to be wrong cuz it idles normally when it heats up. Just got all gaskets changed less tan 3k miles ago. I think that maybe it was done wrong. My head gasket already failed, it leaked coolant. i fixed it will acdelco tabs.. I'm thinking that maybe its my LIM. But i don't know why the throttle response would be late just because of a bad LIM... I could be wrong.

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i would be a little bit worried about a brand new head gasket leaking.

 

clean out your IAC, and see where that gets you

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