Replaced the IAC yesterday on my 1995 Bonnie (SE w/ series II). Also cleaned MAF and TPS with electrical cleaner. Think I FINALLY fixed a nagging warm hard start problem. As soon as I started it up the CES light came on. Also noticed that the shift points on the transmission are now a lot higher - even at partial throttle have to let up in order for it to up shift. down shifts are fine.

My theory is that some of the electric cleaning fluid got into the vacuum actuated diaphragm thingy (what is this called?) on the transmission....your folks thoughts? I doubt seriously the IAC would affect shift points on the trans...but...

Sounds like a bad TPS... The Vac Modulator is only used to control line pressure( shift feel ) not shift timing... shift timing is all done by load factor a.k.a TPS values.. Now you need to know what the PCM is seeing from the TPS..

^^^^ You were right. I pulled the TPS out and recleaned it. I suspect I had the little tang in front of the "T" instead of behind it when I first installed after cleaning yesterday. Thanks!