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The RPM's would bump up to around 1,750 for about 1 second, then slowly settle back down to the "normal" 900 or so. The idle would rest at about 900 RPM's for 4 or 5 seconds, then bump up to 1,750 again and the whole cycle would repeat.




That kind of surge is definitely not normal. I had a similar problem over the winter with the defrost, which also runs the a/c compressor. Dealer replaced the IAC, and problem seemed to go away, it came back one nite for some reason and then went away again. I try not to use the a/c, or def. at all, but if i get it with the A/C this summer I have heard from numerous people that the A/C needs to be recharged so that's my next step, even tho the IAC helped tremendously, so I would try those two things.

1. Recharge A/C
2. IAC

Lemme know how it works out.

I live in Detroit, I couldn't give a **** how good my car is in the "twisties." "I could use a hundred people who don't know there is such a word as impossible." ~Henry Ford