[kronkonn]

well it could be an egr valve. but i like to blame the icm that bastard always tests good at the parts store but the real problem with them is they only fail under heat (like after a short trip) *hint* *hint* they run around 170 new or at a junkyard around 20 if anything at all( they never seem to know what it is so they generally make up some low ball figure for it or give it away unless you tell them what it is or how much it cost new) i love u-pull-it junkyards. get a list of interchangeable parts ( probably none there wanst any for my 91 regal limited, it had to be from the EXCACT car but on my car i changed coil packs and egr valve and fuel pump ( the mechanics fix-all) and alot of crap that was a waste of money for my brokea..... uhh brokeself. anyways good luck and take he coil packs and the black board under em ( the Ignition Control Module =icm) and have em test it for you but if the icm comes un ok just remember mine did a 6 months ago and i changed it on a hunch and no more problems with stalling again.
good luck man.