From rough idle to high idle

[randman1]

Work continues on the 93. Today's project was removal and cleaning of the TB and boy, let me tell you, it certainly needed it. Prior to the removal, the idle was poor: rough, stumbling and stalling. Yesterday I removed the IAC only for a cleaning but after reinstallation the idle was still rough but not as bad.

The cleaning process went well. The TB was removed. MAF, IAC and TPS were removed as well. Then spray...brush...spray...brush...etc untill it looked shiny and new. The IAC received and additional cleaning as well as the MAF. I used CRC QD (quick dry) Electronic Cleaner for the MAF. Then the assembly was reinstalled.

When i fired it up, it seemed to be idling a little to high but since the motor was cold (first start of the day) I figured I'd wait for a while to let the idle kick down. Well, this never happened. It continued to idle at 1500 RPMs the whole time. I let it idle for about 10 minutes without ant change. Shut it off & started again...still idles at 1500.

I did re-use the TB gasket so I don't know if that is my problem or not. I also checked for a vacuum leak but couldn't find one. I'm not sure of the best way to check for leaks either.

Any other suggestions?