stock boost gauge not working

[bezerk]

since i can't et rid off my knock at this moment, i will try to get the rest of the truck near perfect...

I have a 3Bar map sensor, and in Datamaster it reads boost like it should be
...
my aftermarket boostgauge show boost like it is in datamaster.

My stock boost gauge only let me see vacuum, while iám under the the gauge shows up 0 boost/vacuum.. (and i didn't put a checkvalve between the line that goes from the AFPR Mapsensor, Manifold)

 

[GM TURBO]

That's normal with the stocker and a 3-bar.

 

[bezerk]

ahaaaaaaaaaaaaaaaaaaaaaaaaaa, that makes sence than.

Thanks

 

[scotts4]

mine shows boost on my stock gauge and i have a 3bar :roll: could i have something wrong ? my truck runs good even at high boost

 

[GM TURBO]

How much boost are you showing?