I have a 11psi spring in my wastegate and my manual boost controller is set to 11psi (minimum). 1500km and no problem.... but after 2-3 boosting this week, I have 7psi and I can't have more boost. I tried to have more boost with my mbc, but I still and always have a 7psi boost...

Wastegate dead ? MBC dead ?

Help !!

 

my vote would be your wastegate is junk. Even if you have your MBC turned all the way down, you should still be hitting 11psi, thats how I have mine setup.


Either way my vote goes to the Wastegate being bad.

 

I found the problem, Leak in my piping.