hello everyone, I have a 1990 GT thats heavily modded. I am having problems with the my car idling. After I start the car and let it warm up for 30 or 40 seconds the car idles fine, after that, then the idle surges up and then drops, lets say from 750-800 (due to cam and other mods) to 1500rpms. Then it drops down bellow 800 then back up and then back down. It does this a few times then shuts off. I have been reading the forums for what the idle air control valve does and my question about the iac is, if you block it off or disconnect it does it make the cars computer act different, like lean the motor out or riches it up? Does the iac have any other affect on the car to affect how it runs? Im not sure if it has that affect on it or not.