98.5 3500. 10lbs boost max?

I would pull the back plate off of the turbo (where the exhaust elbow bolts on) and take a look at your wastegate puck to see if it is hung open or sitting crooked; which would be like a full time exhaust leak - stopping the building of boost.

The only other thing that strikes me is the possibility (and I know nothing of Quad Adrenaline's) isn't boost fooling. If the Quad does not do boost fooling and relies on a "boost elbow" that is not installed because of your hard line, then the ECM will defuel the truck to limit boost.
I had a bad wire on the Adr. harness at one time that wasn't getting a signal from the map sensor and the truck wouldn't do anything power wise.
Click to expand...
^To be considered...a bad connection or wire in the MAP sensor harness where it interfaces with the Quad.
 
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I don't have the quad on the truck anymore I now have a smarty. I've had the back off the turbo last week and everything seemed fine on that end of the waste gate.
 
run a compression test just to see what the numbers are, crank it till the gauge does not go up any more and thats the number you want, also check the plate on the cly head, if any of the bolts are loose a leak will be there to
 
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