[StealthyWeasel]

Yeah, I am familiar with that throttle hang problem.

Let me tell you something- the throttle system is extremely sensitive to changes. I noticed when you have the car completely stopped it will come down, I assume the IAC takes everything over when the vehicle speed is zero.

Is the cable in the EXACT right position?
Does the throttle body have the ability to turn past wide open throttle? (Reason I ask is that if it does, it has the chance to overturn and break the return spring in the TPS, and will make the throttle hang like that)
Have you modified the throttle body in any way?