maybe its your boost solenoid?

 

The boost control solenoid is not in the equation when an MBC is installed.

 

Well it looks like you have the vacuum lines hooked up right. I would suggest checking the vacuum lines to make sure they arent cut. I have seen some people just leave the vacuum lines dangling and they have gotten cut on the fan.

 

I would cap the boost solenoid, even if it does not solve the issue.

 

I think I found my problem. . I think my boost gauge is bad or there is a hole in the boost gauge line. . Me and my buddy went for a ride yesterday and I got on it just to see if we could here anything and my boost gauge only read 10psi But it felt ALOT higher than 10psi! Anyone ever have a problem like that with they're boost gauge?

 

It is possible. Swap out the gauge first, and if it's the same, then swap out the hoses. I would think you could tell the difference between 10psi and 26-28psi, which is what it would be shooting to if the MBC is set to max...

 

Ya I agree. . It feels like close to 20psi, But also, I haven't been able to actually get on it and go "wot" for a few months now so it could just feel fast. . If you know what I mean. . . If the gauge isn't my problem, I MUST have a leak somewhere!. . Everything else is new, so I don't know. .

 

Warr, even with the "soft spring" in my mbc, do you think it would take it up above 25?

 

I'm sorry it didn't solve your issue. (I just sent him a stock WGA.) I will be the first to tell you that if you're only boosting 12 psi, you'll know it! It just feels like a slug to be quite honest. If you get the torque kick that you remember from the car when it worked okay, then you're probably boosting okay. Trying the gauge is the next best option then like everyone said. Is the whole entire story posted anywhere?

One word of advice... If you do think the gauge could be faulty, only turn your Hallman about 6-7 full turns clockwise. (This is with the stiff spring!) That should put you around 19-22 psi. Don't risk overboosting.

The easiest way to really find out if the gauge is faulty, is to do pull after pull, adjusting the mbc + after each pull, and see what the butt dyno tells you. You'll feel the difference if the gauge is broken.

 

I'm not Warrtalon, but the soft spring is only good for up to 20-21 psi. Isn't that right, war?

 

i got this problem with my 99 gsx =( lol i tihnk my prob is wastegate spring tho... i cant get it to boost over 10 PSI.

 

On the Forge UNOS, it's 19psi or so, but I'm not sure about Hallman. My standard Hallman Pro did not come with any extra springs, and I was able to run 25psi easily on race gas without cranking it all the way up.

 

double check the hoses that you t'ed off for the boost gauge..i had mine t'ed into the far left on the IM came off, and caused boost to not go past 15 psi....has your setup ever worked??? is the turob nip capped ?

 

Well I met up with the member on here by the name of "gearhead".
I took him for a ride and sure enough i'm only boosting 10psi.
We tried running "open wastegate" and still couldn't get above 10psi.
We tried hooking up the mbc lines the opposite way and still 10psi. The car runs great and sounds good during "wot", but once it hits 10psi it won't build boost AT ALL anymore. We also checked to see if there was shaft play in the turbo, and it checked out fine. We are pretty sure that it is not a bad turbo, because my car is spooling up really fast, but won't build more boost. It hits the top boost (10psi) by just a little over 3200rpms. I'm stumped

 

i got the exact same problem dude.

its prolly your wastegate... just like alot of the dsm's the spring goes prematurely so im told. get anotherone