I have recently upgraded the computer on my 97 K3500 to a 411 PCM. I installed a custom os and copied the calibrations from the system loaded on the PCM when I bought it (express van). The truck idles good but stabbing the throttle causes the engine to bobble really bad. If I keep it under 1/4 throttle the engine revs up without bobble. At WOT it bobbles for a second then runs strong- anything less than full throttle results in a continuous bobble almost stalls completely.
I am hoping to get some insight on which parameters are out of line- see attached tune and log.
Some info on the truck:
97 7.4L Engine
Ported heads
28lbs injectors
whipple super charger- old school with two addition 50lbs injectors at the throttle body
Granatelli MAF
Gibson Headers
High Flow cats
4:56 gears with 35" tires
Any help pointing me in the right direction would be greatly appreciated since I am new to self tuning.