CEL, makes it run better????
sorry if this is a repost. in a hurry to gets omewhere.... i got an 01 7.3 134,000. AFE stage 2, ts performance 6 pos tuner, turbo back exhaust. 38x15s. i just left work today and noticed my CEL was on. running fun, and when the check engine light decided to shut off it surged a little whili drove down the highway. came back on. when idling it was perfect with the light on. when the light would go off it would surge sometimes and sometimes die. starts right back up no probems... please help. doesnt make sense that it runs better with CEL on? recent oil change, fuel filter. drained bowl, fuel looks good, put in ful;l tank of fuel. i use additives in my fuel.....