mods listed in my sig. got gauges installed and im only hitting at max 14 and thats flying doing 80 it will tip 14 then it overdrive and it drops.here is a vid and i know someone will say its because its glowshift but i hooked up my buddy's autometer and it read the exact same. any help?

 

Why do you have a boost pressure relief valve?

 

to prevent the cel light from kicking on if i over boosted but that apparently isn't a problem

 

check for leaks

 

any common places to look?

 

rubber boots from Y-pipe to plenums and the square cut o-ring between turbo and Y-pipe

 

Check the plenums themselves too where they seal to the head. Found a leak on my 99 on the front of the pass. Plenum... Up pipes, exhaust manifolds?

 

Yes, up-pipes. especially where they connect to collector. look for black exhaust residue near the connection.

 

I would guess you have a drive pressure leak, I can almost hear it on the video. Up pipes, and go from there.

You can remove the over boost regulator on the OBS. Only time I would run one on an OBS is if your making over 35-40# boost, and thats just to protect the sensor itself.

The OBS do not throw a SES for over boost.

With stock tuning you will not see over about 18psi anyway. If the truck is running fine it could be just a gauge issue as well. It sounds pretty healthy.

 

they dont set a CEL for over boost but they defuel for over boost, they start to defuel at around 35psi.