would an iac cause stumbling problems while driving or just while it is at idle? what would cause my car to start and then die in like 2 seconds EVERYTIME i start it, unless i give it gas, then it stays running. thanks guys!!

i think the IAC (Idle Air Control) only effects your idle. Stumbling while driving could be caused by the TPS, make sure that its set properly, thats what i would check first. Also check your wires, ignition coil, and plugs that might lead us to some answers

Check for vacuum leaks too, that's what I had to do to fix the same problem you are having now.

-Jesse