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aftermarket boost gauge and mbc problems

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scab45

15+ Year Contributor
31
1
Jul 1, 2005
oak lawn, Illinois
iv got some problems guys, i just recently installed a boost gage and a mbc but I'm not sure if either of them are hooked up properly my boost gage does read negative boost while driving without my turbo spooling and when i turned up the boost (which way am i to turn it? to i tighten the ball and spring or listen then idk) and made 2 lil runs and the first time i was boosting 12 then the second time it went up to 14 and i didn't change a thing on the controller i need someone to help me with this like some diagrams on where exactly to install both parts even a walkthrough would be nice
 
What boost controller do you have?

On my TurboXS, there is an arrow indicating where the pressure inlet hose should go, and subsequently the other nipple goes to the wastegate. To increase boost pressure, I turn it counter clockwise.
 
Both installations are really simple. Tap the T-Fitting into the line near the FPR. That takes care of your boost gauge. For the boost controller: 1. remove your intake. 2. Find the little black bcs thing with two lines going into it. 3. Find out which way your boost controller flows. Make sure you hook it up so it flows FROM the intake hose to the boost controller and from the boost controller INTO the hose to the wastegate. Thats all there is to it.
 
iv looked at instructions and they say to tap into the bov line and then straight to the wastegate but i got other things going to the waste gate like a lil black thing that i just plugged up i know for sure the gage is correct now but I'm still uncertain about the controller
 
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