well, its been 3 days now and I think my idle problems is completely fixed, and you guys will never guess what it is...

My air filter. I have it halfway through my fender wall, and I took a gender at it when I cleaned my MAF, and it didnt look too dirty, but on friday while I was swapping t-stats I decided to clean it anyways, OHHHHH MAN! when I pulled it out, I could tap it on the ground and like sand just started falling off, it was all caked to the outside where it was in the fenderwall. So, I cleaned it up, reinstalled and it idles purrrrrrrrfect. I'm glad that it was something simple, to bad I kept overlooking it though

What a shocker.

Hey, it's least she's running sweet.

wow! well atleast now you have all the hard matance done for the next year! haha

Resurrecting an old post. I've been having this same problem since my top swap, at idle car almost dies then recovers, but is idling higher than normal and I can hear the engine sucking in air to try and compensate. So far, I've replaced the O2 sensor, IAC motor, and PCV valve. No dice.

Thinking maybe I'll try replacing/cleaning the air filter? You guys think that might help?

Definatly sounds like a vacuum problem.Chico.

I've checked all the vac lines, they are all new and they look good, I used 7/64" rubber hose for vac lines after my top swap, what vac should I be seeing at idle. right now i see 13-15 in. vac and after it kind of chokes and recovers I will get about 10 in. Hg, is that too low?

Also I've noticed when the motor is cold it will not act up. Once the temp gets above 140ish, it starts to idle like crap.

10 is very low. i get 2x that. And your symptoms sound like a vacuum leak

Here is something i did. On the TB there is a vacuum port that the EVAP canister is connected to. My vac. line was split so i completely cut the evap canister off of it and used a vacuum cap over the top of it. I figure it is one less thing to worry about. It will set an SES light, but it can be deleted with a Powrtuner. Also, check all of the rubber "adaptors?" Mine were all very brittle when i did my swap, so i replaced all of them.

Ordonez, could you maybe snap some pics of how your vacs lines are setup? Maybe mine are hooked up wrong. I replaced my TB screen today, and that didnt help.

sure, i can take some pics tomorrow

thanks man. so you aren't having idle problems at all? also what RPM does your car idle at?

I'd enjoy a series of vacuum pics as well. I'll need it before long.

I have a High Idle issue too after my TB port. I can't find it out. Checked vac lines 10x. Changed out my IAC to a new one, no fix. Another new gasket on TB with RTV on both sides. I also have this issue now when I begin to slow down to approach my house, I shut the A/C off and the car begins to accelerate on its own till about 2500-3000 rpms, kinda scarey. Has happened 5 times now.

I'm not sure if mine is a tuning issue or not. Guy said my O2 sensor was crapped out and wasn't switching like it should, so i swapped it out, now it still does it but only when the motor is warm. I bought a Bosch O2, anyone know anything about those?

Drummer here is what you will need to have proper operation on a top swapped 97,first off the trans. vacuumline will need to run from the nipple under the front of the SC ,T this line and run to the FPR ,the reason you run the line fom trans. to sc is it will need to see boost to shift properly,now the line that normally runs to the FPR will run to the MAP sensor (are you useing the L-36 map sensor?) all other vacuumlines will run as they were before swap except the line that went in beside the brake booster hose this line will now go to the tree on the top of the SC ,hope this helps .Chico.

I have mine setup like that except for my L36 MAP sensor is tied into the line that sees boost because it was giving a high input code when tapped into the line coming off the TB. After I switched it, the MAP kPa readings were normal.

My setup is like this:

Boost/Vac line goes from the LIM -> FPR -> MAP sensor -> Transmission

There is a vacuum only line that comes off the TB and is setup just like it was before the swap.