:dunno:2004 6.0 airaide cold air, magnaflow 4" turbo back no kitty, bully dog power pup run bully in tow mode. I am having problems with engine stalling or just going quite after letting of accelerator. Fuel filters have been changed about 2000 miles ago and EGR was replaced in less than a 1000 miles ago. It also will sputter some when cruising around 50 mph. Anyone had this problem?