i just ordered an sct hand held programer with 3 custom tunes. when cruising at low rpm and starting off during normal driving, the truck has a really bad stumble. it just spudders for a sec. and then it goes. i just put the programer on after installing my stall. so i dont know if its because of the stall or the tune. i do have 2 DTC's which are soft codes. neither has set a ses light. one is a 1124 and a 1760....which is transmission related, although everything works fine, so that wouldnt be it, and the other is a tps test mode or something but there was nothing wrong with the tps before the tune. so does anyone know what this could be? if it is the tune, what could i change? any input would be appreciated. thanks!

cale