AC compressor is causing my RPM to surge?

**Toasty** · 03-18-2008

what kind of noise were you hearing? if it was a metallic type rattling/scraping sound, it's likely that the bearing in the a/c clutch is going out. turning on the a/c and engaging the clutch typically will make the noise stop, until the bearing gets worn too much.

**JCGT** · 03-18-2008

After checking it out I found that the AC compressor is definitely the cause of the noise. The idle issues I'm having are from a bad IAC. I disconnected it today and it smoothed right out. I pulled it out to see how it looked and there is a lot of side to side play in the plunger, not to mention it looks like it's binding. The fact that the idle smoothed out when I turned on the AC was only because my engine speed would increase by 100 or so RPM when the compressor kicked in. Thanks for the help guys.