Bad Boost Controller??

[turbo3000dsm]

I just bought a FMIC and put it on but when I hooked up me Joe P boost controller. This is the first time using the boost controller. I have it "T'd" into a vacuum line from the BOV to the intake manifold, and from the boost controller to the actuator. It will not hold boost steady. Boost well over 20 psi. If i hook the "T" to the actuator I run stock boost. Am I hooking this up wrong or could the boost controller be bad?

 

[oldman]

The nipple on the mbc inline but opposite to the adjustment knob should go to the T on the BOV/manifold line and the T nipple on the mbc should go to the actuator. If this is how you have it hooked up, disassemble the mbc and make sure the spring isn't stuck side ways. Also make sure you're turning the knob in the right direction, out = less boost, in = more boost. If problem persists, you have a defective mbc. Have you done a leak test after the fmic install? If not, I strongly suggest doing so.

 

[turbo3000dsm]

Thanks for the help bruce, but the problem persists. I checked the mbc by pulling it apart and it has the spring with two metal balls. And I checked by blowing into it and turning the adjustment and I could feel the pressure change. I also hooked it up exactly like you said.

 

[turbo3000dsm]

I also did do a boost leak test and it holds boost at 20psi for awhile...

 

[oldman]

Thanks for the help bruce, but the problem persists. I checked the mbc by pulling it apart and it has the spring with two metal balls. And I checked by blowing into it and turning the adjustment and I could feel the pressure change. I also hooked it up exactly like you said.

You're welcome. Is this a genuine Joe P or a knock off? Used or new? Either it's defective, the hose to the actuator is too long or the pressure relief hole is too large, as long as you are sure bypassing the mbc resulted in stock boost level.

 

[LaN-]

check for kinks in the line my intake was pressing down on the vacum line and it was boosting up to 20 psi

 

[turbo3000dsm]

This is definitaly the Joe P boost controller and I also tried someone else's boost controller and the same thing didn't work still just boost well over 20. Do you think I need to hook it up differently, from another vacuum sorce? There is no kinks either, but the vacuum lines are small, very tough to get onto the boost controller.

 

[MindBlowin03]

Ive tried helping Phil with this problem and its stumping me as well. His Joe P. MBC is fine. We took it off and blew into it while tightening the screw and it worked fine. We then took my Hallman MBC and hoocked it to his car and it still creates really high boost no matter what. The lines are hooked up right and everything looks fine.

Im wondering if its because of the EVO3 16g trying to go nuts on him. We all know how they can be nuts with boost pressures sometimes.

 

[turbo3000dsm]

I am putting on new vacuum lines, in hopes that it might cure my problem...., someone else was telling me that the boost controller might have too weak of a spring, is that a possible?

 

[oldman]

Let's give this one another try.

1. Are you 100% sure that if you run the pressure source directly to the actuator, you're running 10-12psi to redline?

2. Are you 100% sure you're talking about all out boost and not boost creep?

 

[turbo3000dsm]

I changed the lines and hose clamped them and the boost controller is holding. Thanks for everyones help...