[birdman941]

I know what you mean about the "backpressure".
The only thing is, the throttle stuck with the engine off also, and there was an enormous amount of pressure required to move the gas pedal.
With the engine running, I have heard where people have drilled small holes in the throttle blade to relieve the pressure.
The suction/backpressure issue is when the engine is running, where there is too much vacuum on one side of the blade.
I still may end up messing with the plug on the rear of the throttle body, and tuning the return to idle with the IAC restrictor.
For now I am about 95% happy with it, and if it EVER stops raining here in (sunny?) Florida, I may work on the final 5%.