00 Ram Van B3500 5,2L with a P1294 code. Recent History: Had stalling issues with NO BUS, then P0505 would come up when it would run again 10 min later. Removed IAC valve to clean it, but it was rusted and pitted, so replaced it. Cleaned IAC mounting port & throttle plates. Replaced plugs, wires, & coil as mentioned on here under NO BUS threads. Also replaced PCV and breather valve. With the above parts replaced, it ran better than before. Plenty of driving in past week or so, no stalls, no codes until today. Seems to be running fine, though right before code came on, I noticed I had to stay on the brakes through a school zone as it wanted to do more than 20mph on its own. Noitced similar symptoms on P1294 thread on here, but most of that thread was on toyota's w/ elec throttles... no real useful info for an old school V8. Where should I start looking?