What is the name of the sensor behind the throttle body closest to the firewall. Ive had this idle problem for a while and i think that is the only one that hasnt been changed yet, i was taking the wire clip off while it was idleing and it was affectig the idle, it would idle steady at like 1800 with the clip out but when i put it back in the idle goes to the lumpy 1000-1400 idle. So i figure maybe changing this would maybe fix the idle.