Red hose decided to pop off on the S3 yesterday, loosing all boost.
Just put it back on and the car still isn't boosting right, foot to the floor in 3rd it's doing 14 psi max.
It's remapped stage 1, normally boosts to at least 20 psi and holds it all the way through 3rd.
What's the common causes for underboosting? Need to investigate tomorrow...