Allrite so I have forge mbc on my evo but I can't get the boost level ti raise over 18psi and in sum gears it doesn't go that high, but anyways when you remove the stock vacuum line next to the boost control sensor thingy if that isn't plugged could that affect boost? Thanks in advance

Adding to that no matter how much I turn my boost controller up or down the boost level doesn't change why cud that be

 

What spring are you using? If you got the old batch of the Forge's, the soft spring was only good up to 19psi or so, thus you would have to use the stiff spring.

 

I don't even know I bought it about a yr ago from pruven

 

I would look up the "How-to" on the Forge MBC and make sure everything is hooked up according to the write up. If everything is correct, you are probably using the wrong spring.

I hope you get it figured out.

 

allrite i guess thats gotta be it then, ill order a hallman and call it a day, thanks guys

 

dont order the hallman... just get the heavy spring... that is what is wrong. if you can wait till monday, ill sell you my controller... pretty cheap, i jsut bought the aem truboost

 

yeah, just get the stiff spring, turn it all the way down, and adjust from there. contact Forge and they will send you the spring, and it's easy to replace.