Rough start/stalls on startup with AC turned on

jpk

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Lately I've been having an issue in my Terminator where the car doesn't startup smoothly if the AC is left in the on position. The idle drops almost to zero before for a split second before picking up to normal or sometimes stalls. Startup with AC turned off is smooth and normal. Not sure why the AC would be dragging down the engine that much. Any ideas?
 

cj428mach

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I would look at the following things

Tune- Has it been recently tuned if so start there, if it hasn't been recently tuned then its not the tune.

Vacuum harness- The AC controls are tied into the Vacuum harness, maybe you have a leak in a hose that is exposed when the switch is turned on.

Iac- Make sure its clean and working properly

Does the car lug down when you kick the A/C on when the car is warmed up and you flip it on?
 

jpk

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No problems when I flip the AC on a couple seconds after startup. How do I find and check the IAC valve?
Thanks!
 

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