Some how my Profec-B is screwing up. It's brand new. Low boost is at 10psi and high boost is set at 15psi. Low boost is great right to 10psi, but for some reason when it's on high boost it will go to 12 sometimes and 15 sometimes. For example I'll be in 3rd and punch it, it will only hit 12psi, or it will hit 15psi and when I hit 4th it will go to 12psi. It's really starting to piss me off. Has anyone experienced this problem, can anyone help me out?

i guess you already checked the lines and the tee?

may sound stupid and obvious but make sure your balance is set all the way sharp.

Originally posted by sr20ser1997
may sound stupid and obvious but make sure your balance is set all the way sharp.

...and (also stupid) make sure the dip switches are flipped for your setup per the manual.

The switches in the back are correct. Doesn't having the balance all the way sharp make it spike?

I always had a problem with my Profec B until I used the larger vacuum line that came with the unit. I guess the small vacuum line is not good enough for the amount of vacuum it needs or something like that.

Originally posted by SE-R / GTi-R
The switches in the back are correct. Doesn't having the balance all the way sharp make it spike?

thats how i have mine set?