Question about Pontiac Grand Am
Hi! You may want to check on the MAF (mass air flow) sensor. The mas has big contribution on engine performance specially on the idling and vaccum supply. The MAF is surely faulty thats why the RPM is high and increases while going down. Have it replaced and you'll be good. Hope this helps and thank you for using FixYa!
Posted on Oct 08, 2010
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Posted on Jan 02, 2017
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