Roaming/high idle

[SVTwhore]

I recently had had the top end partially disassembled to replace the lash adjusters on my '97 Cobra. A couple were making noise and not pumping up with oil. I've got everything back together as it was before I tore it down and am now having idle issues. For the most part when pulling up to a light or whatever the engine wants to idle at 2k RPM consistently. After 10-15 seconds it will idle back down to a somewhat normal RPM at about 1k. Sometime it will sit and idle up and down from 800-2k RPM, it to clears up after sitting for a few seconds. I'm rather baffled by this, could anyone get me a diagram or a place to find one online for the vacuum line routing. All of the lines are hooked up but maybe I hooked a couple up wrong. Any insight would be greatly appreciated. I really need to get this thing finished up.

As far as mods go the car has an Accufab TB, Vortech S-trim, full exhaust, supporting fuel mods and some other items that are irrelevant to this issue. It has been tuned and ran fine less the lifters before tearing it down.

 

[1997Slobrah]

Most of these cars do this... higher idle when stopping at a light and then they die back down after a few seconds, but I have never heard of it staying at 2k..

 

[SVTwhore]

^^^Mine didn't have any idle issues before. It did have a slight miss but I resolved that with new ignition components (plugs, wires and coils). I must be missing something small and relatively easy, just not seeing it yet.

 

[1997Cobra]

vacuum leak? do you hear anything like a whistle?

 

[SVTwhore]

The only whistle I hear is from the SC. I'm going to tear into it this weekend again and see if I can find something that I may have missed. Figure since I'll be in doing the clutch I may as well go back through everything again. I know it has to be something small.

 

[SNAKEYE]

Clean the IAC with carb cleaner. Use a tooth brush to assist the cleaning process. Do not try to move the pintel - it's a screw drive.

 

[SVTwhore]

OK so I cleaned the IAC and no change. Is there a possibility that the TPS is out of alignment? Any advice on adjustments would be great, this is really starting to frustrate the hell out of me. Another question. If I put the Oval Accufab TB on (the big one, 1700 CFM) would I need a re-tune since it's flowing considerably more than stock? I bought one, just waiting for it to arrive, though I would still like to figure out what's up with my current setup.