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!

[lagos]

Put the stock wastegate back on.
Remove the boost controller and just connect the port from the turbo to the port on the wastegate together with some good quality 4mm fuel line hose. Then take the car for a ride an see if you can make anywhere from 5-8psi of boost. If you can, everything is working correctly and you need to then install your boost controller and set it up for more boost.

took the car out for a drive and it held to 3lbs then eventually dropped, and would not build boost at all eventually

Because you put some crazy aftermarket wastegate actuator on that was never meant to be used with this turbo and your flapper door is probably blowing open every time you boost.

This post has been edited by lagos: Jun 6, 2012 - 9:02 AM