On the TVS, did you check continuity using the WOT contact? Either the L or R contact (can't remember which) is idle, the other WOT. THe middle is ground. Continuity should occur only when the switch is at the respective position (idle for idle, WOT for WOT). If that doesn't work, you can try spraying some air intake cleaner on the butterfly valve, and exercising the linkage to open and close the valve a few times. Still, because you're troubleshooting an idle problem, lack of WOT enrichment probably isn't that big a deal for you now.

For the microswitch, find the switch on the accelerator linkage. Check to make sure that the linkage presses against the little swing arm when the accelerator is at idle, and that the linkage positively actuates the switch with a click. Mine didn't - the arm would ride on top of the linkage. If the arm works, then check for continuity when the switch is activated. All it does is send an on/off signal to indicate when the engine should be at idle.