I looked at the FAQ on the left column (3rd one from the top). It has to do with the Throttle Position(ing) Sensor on the driver's side of the throttle body.
I have done similar mods that you have. I re-installed my TPS incorrectly and basically busted something inside the TPS.
FOR YOU:
Start with the wires, make everything isnstalled correctly: make sure the TPS is not damaged. Make sure that the TPS gear on the interior side that mounts to the Throttle Body, CAN recoil back to its resting position.
When in doubt email Todd direct or call. Look at the site sponsor/current sponsor on the left.