i have a 98 gst and my mbc seems to not be working. my car wont go past 13 to 14 psi. i have a turbo xs mbc with fine tune. it was on the car when i got it. both of the end werent sip tide so i sip tide them so nothing could leak out or anything. i looked up the instrustions to it and how far do u have to more the screw to get more boost?. i went 3 or 4 whole turns in and nothing? any ideas

 

are you sure that it is installed correctly.

 

im pretty sure. is there a stock mbc?

 

or ebc? casue it is tapped into a diff line going to something electric. should this be unplugged all together and only run it throught the one line?

 

Can you post pics?

 

ok i found it all out reseasrching it. i just elimited the stock line. and went from turbo pressure line to mbc then into the wastegate. i usually vaccum at 20 and now im vaccuming at 19. would this be a small leak in one of those lines?

 

Fully close the valve and see what that does (clockwise)

That vacume is normal by the way.

 

It's a bleeder valve, it's normal. But it would seem that you may have the **** too loose. Also check to be sure that you don't have old and crusty vacuum lines for leaks.

 

clockwise pulls the screw all the way out?

 

It does? Well then the other way.

When the f does turning something clockwise screw it out...