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High Idle when hot

New User
Posts: 14
Joined: 03/12
Posted: 10/30/15 05:57 PM

I've had my 5.0 tune with a chip. When idle, cold everything is ok. But once it get to full operating temperature, Idling goes off chart. between 2/3 k RPM's Takes up too 15 / 30 seconds to drop back too about 1300 rpm's    What would be causing this???  

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