not building boost, am i missing something? Options

[easternpiro1]

Hi all, was wondering if i can get some feedback on something i was missing. here's the story:

recently a friend and I fixed a leak due to stripped thread in the head causing a leak between the exhaust manifold and block.

after rethreading and putting everything back togehter leak is gone BUT now im seeing much lower boost numbers after taking it for a drive.

I own an AEM tru boost controler/gauge and the boost is currently set to stock wastegate pressure (8psi) and consistently held this pressure PRIOR to fixing the exhaust leak.

as of today, my first drive out, my car would not pull past 5psi and touched 6psi BRIEFLY. I double checked my IC piping and adjusted and retightened.

when i went back out the car would only boost up to 4-5 psi adn sometimes as low as 2-3 max.



Im pretty sure its a leak somewhere but it can only be one place as the only IC piping that was removed was the piping coming from the turbo (charge side) i have checked and double checked it.

is there something im missing? any helpful hints would be appreciated! thanks!

[easternpiro1]

OOOKAY. I took apart ALL of my IC Piping, cut larger diameter holes for the charge piping and cold piping to go through, as it was rubbing, and used my nifty boost leak tester to find any leaks in the system.


I heard no air escaping from the lines which led my friend to believe that my blow off valve is probably leaking (hence the stuttering and NO boost being built under load) I have a TIAL Q. I will be trying a heavier spring, and HOPEFULLY that will fix the problem... I'll be saying my prayers extra hard lol.

if its not the BOV, my attention will FULLY be turned to the wastegate possibly being stuck open (which we believe may not be likely due to the fact that after preloading it, it built up to 8 psi as hoped, then dropped later.


UGH.