My turbo coupe has developed a problem recently where it stalls out upon start-up and has a jumping idle. When starting the car sometimes, it will start right up and seem fine, then just stall out. When it gets warmed up, the idle will go from 900 to about 1500 and will stay there until the car is shut off. I've replaced all spark plugs and put in new ones gapped at .30 along with brand new wires, distributor cap and rotor. Car also has a good IAC that has been cleaned. I've also cleaned the sensor wires on the VAM. The car ran like a top until just recently. I'm thinking maybe it's the TPS? I have a spare TPS from a 5.0 throttle body, will that work with the 2.3 motor? Opinions on what my problem might be?
