I had the same problem but it got worst and now lopes at an idle. It doesnt throw a code. I think its the fpr but Im still not sure.
01 Chevy Silverado Crew Cab 3500 Dually 4X4 LB7
Mods: Straight Pipe, K&N Filter, Bully Dog Pyro and Boost Gauges, Air Box Mod, Intake Horn Mod, SuperChips Cortex Tuner, Jvc Deck, Pionner amp, MTX subs.
89 Chevy Camaro RS Convertible 305 auto, working on engine mods
76 Chevy K-10 on 38's
87 Toyota 4Runner stock with custom bumpers and 30's
82 Yamaha XJ-750 4 Cylinder motorcycle all original
94 Gulfstream Tourmaster 5th wheel 38' long 2 slide (my home) got it free :rockin