My DSM is idling too high. Can you help? Options

[JohnnyWadd]

Hey, guys. Ever since I put my car together after the theft, it's been idling too high. I had to put a different throttle body on her, so I figured it was just the BISS. I tried spinning that in, and it didn't help. I bottomed the screw out, and it still idled at around 1900 rpm's. I woulda thought that screwing it all the way in woulda killed it.

Anyway, before I jump into trying to diagnose this problem, I want to get as much background as possible. If I'm going to start searching, I want to search it all. So, I was wondering if you guys could tell me what to check. Can you guys list as many things as possible that control idle speed? That way, when I jump into it, I'll be able to check everything at the same time. I'd rather do it that way than check one thing, quit till later, check another thing, quit till later, and on and on. Ya catch my drift?

Anyway, if you guys can help me create a list of things to check to back my idle down, I'd appreciate it. By the way, I drive a 1991 Talon TSi FWD 2.0L Turbo.

Thanks
Jon

[JohnnyWadd]

Didn't get a chance to check any of the other things yet, but I had a few minutes yesterday, so I played around with the ISC motors that I have. I've got access to another 1g DSM. It's a '92 Non-turbo Talon. I unplugged the ISC motor that is on that car, and I used the plug to see if the ones that I had would do anything when powered up. Sure enough, all three ISC motors started vibrating as soon as the key was turned on. Didn't start the car. Just turned the key on. I did the same test on my car and nothing. Seems that my car isn't getting any power to the ISC motor.

I seem to be hearing a lot of chatter about the ISC motor not causing high idle. Seems that the popular response is that a bad ISC motor would cause it to idle too low. If that's the case, is it possible that the ISC motor is not responding because the idle is too high from something else? This doesn't make sense to me as it should vibrate when the key is on before the car is started, shouldn't it? I'm going to follow the suggestions I've got from you guys plus the vfaq very soon. I'll let you know what I find out.

Thanks
Jon