Hey I fixed that I just read your problem and something similar happened to a Chevy C2 except that the Chevy turned on well, but when it was heated you were walking and melted, you stopped, and began to tremble as if it wanted to turn off, separately was consuming a lot of gas because it brought the temperature sensor of the antifreeze evil. And because his remedy was to change it, and that of the IAC is not the problem, if that were the problem the car is turned off, its function of the IAC is to keep the car on at low RPM, in case it would fail, the car is automatically turned off) the other would be the temperature sensor of the antifreeze (what it does is send the signal to the computer when the engine is cold, it makes it possible to keep it. In this case you may inject more gas and drown alone. Salu2 and I hope this.