1996 Plymouth Breeze 1996 Breeze will not keep running!

I picked up the car last night. It ran OK at first while loading, but began to choke down after a minute or so. This morning, it fired up and I unloaded the car and pulled it to the driveway and it ran fine. I only had a minute to set with it while I revved it up and down and it returned to idle fine. I am starting with the idle control motor and/or EGR. Then maybe the idle position sensor. The diff in idle with temp change makes me think sensor?

THANKS!

When I took the air cleaner housing off, I noticed the throat and flap in the throttle body were pretty dirty. I cleaned those. I also squirted the cleaner down the tube to the throttle control valve and sprayed the outside of the EGR. This seemed to make a measurable difference. Also, there is a screw that will adjust the idle mechanically. It is in the throttle body and the throttle cable arm rest on it, but I could not get it to turn - I can see threads on it. Anyway, I wrapped a small amount of foil around the base to ease idle up just a hair. I drove his car to Atlanta last night and it did ok. Only certain conditions cause it to stumble (but it reecovers). If setting at idle in gear and I tap the gas to move up, the engine rpms drop very low, but it recovers. Interestingly, I noticed the TEMP gauge never moved and commented that I guess I need to relace the sensor! I'll do that also.

THANKS and I will keep posting.