Have you connected the wire block back on to the TB? If so then your TB is fecked in the way of the stepper motor not getting back to its lower adaption limit. The R-Tech hi-tec way to fix this is to get a big screw driver and use the handle to tap the plastic case on the side of the TB, and at the same time get some one to switch the ignition on for 10 seconds then off, do this 3 or 4 times and the stepper should drop to its lower limits.
Another thing did the TB gasket go back on in one piece?
Let me know how you get on.
Nick
R-Tech