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2003 Deville this car is driving me nuts

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T

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Discussion Starter · #1 ·
so I am still stuck on this issue after replacing my idle air control and a good cleaning of throttle body and inspecting the PCV the RPMs seem to be ok now holding steady at 650 in park however after I Drive the car for a little while and it warms up when I place the car in park it starts shaking very roughbut the RPMs stay at 650 like they should a quick trip to the store however it does not do this what else am I missing!?!?I'm still not getting any codes other than a memory seat module
 
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tlblack
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