boost falling off please help

[xsephish]

Originally Posted by carlameyer

I would replace all vacuum lines first. Next suspicion would be injector seals or throttle body shaft seal. It could also be a leak on the wastegate. Ensure there are no cracks on the hotside of the turbo, particularly where the wastegate is separated from where the o2 housing connects. It could also just be the turbo if you have 100k on the car. Pretty sure stock turbos are not ball bearing. Trying to get the stock turbo to hold that much boost over 8,000 rpm is asking a lot. Even my 35R tapers by about 4psi or so above 8k rpms.

Aftermarket Car Parts

all of those are excellent points for your first post troll but i will quote and reply for the bump thanks