I don't know if this is related to my other post lots of mods now problems, but since I added these mods 62/14, #100 plate full forward, 370 inj, 4 inch exhaust and s&b intake now when i approach 3k RPM's my truck starts to feel like your pushing the throttle rapidly from wot to about 1/2 throttle like a bucking horse. lol I know its defueling (haven't installed the 3GSK yet) and the only reason I even get near that rpm is my fifth gear nut backed off again. But the truck never did this before the mods. I know I need to time my motor, the pump is only 5 months old, had a extended warranty and dealer replaced the pump.

 

I would say the timing is key to the equation also with those mods I would definetly have a gov. spring kit to fully enjoy all the potential..........

 

got the GSK already just been extremely busy hope to install this weekend