ok my idle was bad so i decided to mess with my tps. i couldnt figure out how to use my multimeter intill i work my tps. i over turned the tps and the lil black piece inside now moves in circles real easy. i found that i connect the posative to the middle wire on the tps harness and the negative on any ground. and set it to dcv 20. well now the volts are .14 and wont move at all so i think its broken? are these easy to break? im fixing to go buy another one from ford tomarrow is it possible to drive my car without it or is it needed?