A vacuum leak or an improperly set TB screw will result in the IACV not being able to remove sufficient air and a code being thrown. Since you have an aftermarket TB my bet would be that a) your TB screw is improerly set or b) your TB plate is not fully closed at idle
Well obviously those are the first two things i set up when installing the TB.... One problem with the JG throttle body is, it sticks at near closed throttle. After that, the vacuum from the manifold was keeping the throttle plate slightly open when i let off of the throttle. When the engine wasn't running the plate opened/shut fine. But, while running It wouldn't return to the closed position because of a strong vacuum pressure.
The thing that bothers me is, why would the valve throwing a code completely screw up the motor electrically?? I mean I can barely even drive the car the way it is now... I've had problems with iacv's before, and you all know it just creates a high or steady up and down reving of the motor..... I have the valve unplugged now and the problem is still here. I'm starting to go insane thinking about every possibility, and trust me, i've replaced and checked EVERYTHING I could think of... I'm meeting Neil at his shop tomorrow to see if he can figure it out because i'm stumped...
Tampa^Bud, sorry to intrude on your post... did you get the problem fixed? or are you having the same problems as me?