Mystery bolt at rear of p7100 pump
 

Ok guys I'm a little lost here. I was trying to explain to my neighbor who has a 96 what I did to my old Cummins. But I don't remember clearly.

12 years ago when I had my '97, I took it to the local Cummins guru for a little tune up. I already had a 4" exhaust and a AFE CAI. So he dives into the AFC housing.

This is what I remember. He slide the stock plate full front and then took off the back cover, removed a bolt and lock nut, then replaced the cover. It took all of 15 minutes.

But what bolt did he remove? There's nothing online that discusses this.

I know it made truck a bit of a handful to drive in heavy traffic, as it wound up like a bottle rocket. It took away a little bottom end but had an explosive mid range to it. I drove that truck for another 60k without any ill effects from it.

Does this make sense to anybody here? I don't think I dreamt it:w2:

sounds like the -fuel screw on the back of the afc. and dont take it out it is for preload on the diapram. you can for sure play with it to get disired smoke

hmm possibly. That truck smoked real good. But it also ran real good too. Looking at some of the tech articles on this site, I wonder if he removed the governor adjustment bolt.

What would happen if he did?