Maybe someone on this thread can answer this question.
At which point should the "Rack" initailly hit the stock fueling plate, when the throttle is engaged?
Here's why:
Last weekend a couple of us helped a friend install a TST #8 plate. When we opened the AFC housing, we noticed the "rack" was hitting in the "groove" of the stock fueling plate. This didn't appear to make sense, so we explored further. We discovered the locking nut for the adjustment, that controls the "Rack" height had come loose (or was never tightened properly) and the screw had backed out. This causes the "Rack" to raise and appeared to be what caused the wrong intercept height. Our friend had purchased this pump as part of a 230 HP Uprate kit from Cummins Recon, which adds to our concern something could be wrong.
Taking a guess, we adjusted the rack to hit the lower bump (slightly up from the bottom) on #8 fueling plate, assuming the rack would ride up through the groove, under normal operation.
The truck develops 26# of boost, and seems to have reasonably good mid and high end power but the low end stinks. Boost seems to build "slowly" and the truck is a "slug" when starting from a dead stop.
Did we screw up or not, and could the remaining problem just be AFC and idle adjustments. Any suggestions and advice would be appreciated by you 12V experts.
Thanks,
Frank Dz