[chevelleman]

one sure fire way to see if the fuel pressure regulator is bad is to take the vacuum hose off and see if any raw gas comes out of it after it sits for a while or right when you shut it off take the vacuum hose off and watch to see if any gas drips from it what happens is the rubber diaphram ruptures and start leaking and you get unmetered gas getting sucked into the engine

another thing to try is the check the resistance across your coil packs i had a coil go bad on me last winter and it was doing exactly as you described, take the two plug wires off the coil pack and check the resistance across the terminals spec on them is anywhere from 10k-13k when i checked mine when my car was hard to start the two bottom ones read about 12k and the top one read 30k when it was cold and when it warmed up it would read about 20k once i changed the coil pack it started like a dream