mine did the same thing but my injection pump blew up throwing metal shavings into my injectors causing the injectors not to fully close
Truck: 2008 Chevy Silverado 2500
Motor: EFI Live tuned by Rob, Air Dog 165, Ported fuel rail fittings, Plugged rerouted and shimmed, Snow stage 3 Mpg/max, AFE mouthpiece, Dimond eye downpipe, High flow intake, y-bridge and EGR delete, Hot side pipe, 50% injectors,42% Cp3, 4094 turbo, Big dipper trans, 4.56 gears.
Interior: Edge Insight, Autometer pyro,boost,trans, Kenwood headunit with backup cam, Duha, Neoprene seat covers
Exterior: RDS 75 gallon fuel tank/toolbox, EBC slotted/drilled rotors, B&W turn over ball, Maghytec diff, RX 9000 shocks with air. Fender flares Road Armor front & rear bumber and bed all line-xed color matched, Billet grille, Dual 4 inch exhaust, 6 inch lift, 22 inch wheels in nitto terra grapplers,Led smoked tails