throttle position sensor replacement (Page 3/3) altownsend FEB 08, 09:12 PM These posts are old, however, if anyone is still monitoring them or gets emails on new posts, please respond: 1986 V-6 Fiero Engine will not idle. car has been sitting a long time, and probably has not been on the road for 6 or 7 years. It will run if I feather the throttle. All sensors on the engine have been replaced with new ones, including the oil pressure switch, fuel switches and relays. It has a new fuel filter also. Fresh gas, fuel pressure is between 35 - 40 PSI. New plugs, plug wires, rotor and cap. Now, when I unplug the TPS, and start the engine, the engine will idle with no problem. It throttles well, however has a noticeable misfire. I am presuming that I need to change out the throttle Position switch. Someone, please confirm. Does anyone know anyone with a fuel sender? I can't pay what the Fiero Store is asking for one. Please ask around to see if someone has a working unit. Thanks