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]

You take the downpipe off and you'll be able to see it. sometimes you'll need to replace the wastegate actuator (if that is causing it)
or it might be getting stuck on the downpipe flange (i believe i recall this happening on 3sgtes with an aftermarket downpipe, but that recollection is from years ago)

it really depends why its stuck open as to how you unstick it.

hey guys, brief update....

cam (boosted185/phoenixtech) came up to visit for a drift event, and we talked about the problem, and he noticed that the w/g rod was actually bent a bit, (as suspected). he suggested replacing and all would be well!

here's the WEIRD part....


while i was at a light I ran out of my car to engage in random foolishness, but to make a long story short, i did a wheelhopping burnout, and then i noticed that my boost kicked in. apparently the vibration shook something loose, causing the w/g to free up a bit I suppose.


WEIRD o.O im still not satisfied with the consistency of the boost (will only hit 6.5psi instead of high7's) which means the w/g is still open partially but im glad i know exactly what it is, however not the question is how to go about unsticking it (as was stated above)


the w/g isnt getting hung up on anything so i guess it was just acting "weird". I have no idea why

thanks for the help! everyone!

This post has been edited by easternpiro1: May 27, 2012 - 7:15 AM