Took the IAC unit out of the throttle body on my '92 Grand Am's Quad Four today. Wanted to clean it up in hopes of clearing a code 35.
The service manual very clearly shows that the IAC has an o-ring for sealing. By golly I can find neither hide nor hair of that darn thing. Don't think it fell off when I pulled the unit out. Have looked around on the floor and under the hood. Don't see anything, but that doesn't mean it isn't there. The IAC has not been removed in the past to the best of my knowledge. Surely it does require an o-ring does it not? If so would you know what size it is? Can't find a listing for the o-ring on the Advance, AutoZone, or NAPA sites.