I just got done installing my MBC last night and i set it only 1 psi higher than what i was running before (now holds 17perm) the cars runs great no fuel cut or leaks, except now It seems the timing is off.

When I drive normall shifting under 4k everything is fine and smooth, but as soon as i start to accelerate a little (not get on it, but ya know enough to wear you see you psi raise even just to 0 or under 5) my car reaches about 4krpms and then creeps up to 4.5 and then back down to 4, like it jumps as if it wants me to get on it and floor it. It never did this pre mbc but I dont think the mbc could be the reason, cuz the psi doesnt spike past what I have it set at. only my rpms creep up then back down and its really annoying to drive.

 

Its most likely your clutch is going "slipping". You gave a typical description of the beginning of a clutch death

 

most likely clutch slipping...

and if you have a 9 and all the lights go on for the acd than its the computer

 

ur clutch is probably slipping badly how many miles & launches u have on it

 

I don't suppose this was down hill was it?

I've noticed when the car goes into vacuum it stalls becuase the injectors cut then it jumps back into the action when it slows down enough. I typically avoid when the clutch in

 

Did you source pressure for the MBC from the BOV line or the LICP (Turbo nipple)?
If you are running from the MBC line that might be the problem.