[airic]

I would check the throttle position actuator, and the closed switch for proper gap and operation. This is assuming you have the mono motronic fuel injection (one injector)

If you have the mototronic system, which I belive you have due to saying the idle air control motor in a previous post. The first step on that system is to clean the IAC valve and the throttle plate area.
The IAC should buzz when energized and should not indicate an open circuit. The AC on signal goes to the ecu then it adjusts the amount of bypass air.

A good cleaning should fix it up. If you need pin outs for the signals or expected electrical values please let me know the engine code (AAA)?