Boost pressure issues

[Timbo79]

I have a new to me 2002 ram 2500 6 speed with a fair amount of mods done to it. I came with the quadzilla adrenaline and I'm having issues with the boost gauge on the quadzilla sticking at 47psi this in turn causes tons of black smoke and poor running. I turn the truck off and restart it and most times it goes back to normal. My question is where does the quadzilla get it's boost pressure from? MAP sensor? If it gets it from the MAP sensor and it is causing the problem shouldn't a cel come on? I'm also having a hell of a time getting a good tune downloaded but that's another issue all together 

[Me78569]

bad map sensor or a short in your map wiring.  i had this issue without a cel.