Im not exactly sure if anyone has wrote this in this thread Before but i have beeen a victum of this surging Idle so i jumped the DLC and did the flash test KOEO test and got code 63 TPS signal open so i took off my TPS which was new from autozone and tested it it should have 5000 Ohms when probling i think sig rtn and TP signal and when probingsig return and Vref you should have 0-5000 Ohms varing with tps location anywho long story short i hooked up a tps we found in the shop and tested it first put it on the car and surging idle GONE! New parts dont mean good parts...now im dealing with another problem code 94. blahhhh!