Living Large
Registered Member
Wierd question, I have a 91 suburban with 350 ,4l80e. Today, before the outside temp got over 100, it ran great. This afternoon it was over 107 and the sub stalled when running at freeway speeds with a/c on. It would just die, coast to the side of the road. Tried to crank with no fire. Let it sit for a few minutes and it would fire up and run fine. Get back up to speed with the air on, and same problem. Ran about 20 miles with no air, and it never stumbled. Could this be the IAC? MAP? The problem seemed to be worse when decell off a over pass. Is it possible that the IAC is not compensating for the added load of the A/c compressor? Ran computer for codes and showed none. Thanks Rusty
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