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JasonG · 12-13-2018, 10:37 PM

Just a weird thought. Could the IAC be partially open upon shutdown? This could be causing the high idle. ....
Try removing it, extending it fully then reseating it, then leave it unplugged.
Just a thought.

12-13-2018, 10:37 PM	#8 (permalink)
JasonG Master EcoModder Join Date: May 2009 Location: Charlotte NC / York SC Posts: 728 05 DMax - '05 Chevrolet 2500HD 90 day: 18.48 mpg (US) Thanks: 120 Thanked 56 Times in 52 Posts	Just a weird thought. Could the IAC be partially open upon shutdown? This could be causing the high idle. .... Try removing it, extending it fully then reseating it, then leave it unplugged. Just a thought. __________________ I can't understand why my MPG's are so low..........