[Aredubjay]

Unfortunately, it could be a million things (I know. That's not what you wanted to hear). The lack of a C/E light leads me to believe that it's not within the computer. Seems to me it would have to be vacuum or intake related. Check your hoses and check your plastic intake components for cracks. Expansion and contraction (heat to cold, cold to heat, etc), sometimes causes little cracks in the plastic to open or close, depending upon heat or warmth.

Still it could be fuel related. There is a hose that Beav spoke about (I can't remember which) that condenses and plugs up. You might do a search. Sorry I can't be more specific.

Also, there's a "General Engine Trouble Shooting Guide" in the "How To" locker. You might try to match some of your symptoms and try the fixes recommended there.

Best of luck.