I'm not to sure what to do about this and I'm hoping that someone can offer me some sort of explanation before my extended warranty runs out and I'm stuck with a major problem. My 2000XLT runs like a dream, with one exception....... I turn the control dials to cold and leave it on floor/panel. Hardly ever do I turn it onto the designated A/C setting, it gets cold enough so never find the need. After doing stop and go driving throughout the city, every time I pull up to a stoplight, I watch my RPM's bounce up and down and feel the engine pull (don't know if that's the right terminology, but that's what it feels like). But it doesn't do it when I drive straight for 5 -10 minutes without stopping, seems that the stop and go driving is the culprit. Talked to the dealership where I got it from and some idiot gave me the lame explanation that "its just the way Fords are" I then promptly hung up the phone and am now writing to all of you hoping for more of an educated explanation. I hope I gave you enough info, but please holler at me if I didn't! Thanks all! I appreciate it greatly!