A little history first I have had five shops look at my truck and charge me money and through parts at it. My truck has 5.3 whipple charger 42LB injectors, Walbro intank pump high output, tholy headers no cats 3'' exhaust and nelson tune. I have had poor AllenTalk to three of these Utarded Mechanic's. Allen has been nice enough two send out two PCM'S of course and listen to my struggle over the last few month's. Any help or idea's would be great. First off the truck runs fine at low RPM if you get into the throttle it acts like it is starved for fuel and falls on it's face if you slowly get into it it runs better. It also runs much better when cold. The first shop told me I needed a new fuel pump, installed a Walbro high flow pump. With the fuel pressure at 60 psi Wot and foot on the brake the truck fell on it's face for a quarter of a mile still like it was starved for fuel. With a snap on Modis it showed not one misfire in live data and no codes. A computer later I gave up on those guys. Next shop has a tech 2 scan tool. No codes they said they even disconnected 2 plug wires and let it run for 15 minutes still no codes and no misfires in live data. They have some exhaust sniffer tool and said it is rich at when it is poping. Still had one of the PCM'S so they put that in there again no change. I skipped a few mechanics but this last one taught at a college and seems to know the most. He has still had my truck for 3 weeks and run dozens of tests. Same result. I have note's on all the shizz I have been through on this if anybody needs more info. Thanks in advance