first off let me tell you gus a bit about my car. its a 2000 audi a4 1.8t, gutted air box, apr stage 1 chip, apr exhaust, and suspension. from 2nd gear at WOT ill peak at 20psi fall to 15psi then fall to 5psi by 5200rpm, im unsure whats going on, im a former dsm guy so im not highly familiar with these cars. I was hoping someone on here can tell me whats going on so i can fix my loss of power issue im having here.

 

20 is your "spike" 15 is where you should be, the falling off to 5 is a leak of some sort. I would suspect a hose but what dv are you running?

 

stock DV.

 

That's likely at least part of your problem.

 

What would be the other half? N75, and boost leaks?

 

car wont boost past 5psi as of today.

 

Bump....

 

Car went into limp mode. Try getting an upgraded Diverter valve and that should help. And check for vacuum leaks, those are a big issue. Try cleaning your MAF, too.