I have a 2005 Chrysler 300 with the 3.5 v6 engine. Here of lately, the engine will rev way up beyond what is normal on a cold start. It will almost immediately return to normal idle speed. What is th
Check for check engine codes. If no codes, it could be that the TPS sensor is going bad. Try cleaning the MASS air flow sensor and throttle body first. Make sure to follow instructions on proper cleaning procedure
Tire pressure sensor? I don't think so. Maybe the IAC or the MAF.
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#3David Mitchell Sr.Reputation840