Ok, I have looked, Searched, Cussed, and tried everything I know to do. Now I cant seem to find a "sticky" to point me in the right direction.
On my 1990 MMM, It has started to high idle. Not throwing any codes. Fresh MAF Installed few weeks back.
1: I have unhooked the battery for 10 minutes, I then connected the battery and let the truck idle for 10minutes to "set" the standards. Didnt work..
2: I checked the Idle adjustment screw, its not even touching.
3: I have checked the cable, It has some slack.
4: I have checked for vaccum leaks.
5: If I disconnect the IAC the truck idles down, (( Is there an adjustment I am missing on the IAC? ))
6: Checked the butterfly and no blockage there.
I can't seem to find what is causing the problem.