HELP - New Blow off Valve Problems

[civileclipse]

Okay first off, i'd like to apologize if this issue is addressed on a daily basis.. I searched the forums, but I couldn't find anything about my problem. I have a 95 Eclipse GST, with a 16G turbo. I just installed the GReddy Type S Blow off valve, and when I go to boost it just keeps going. Before I installed the new blow off valve I would hit about 12-13 psi full throttle, whereas now I spike up to 20 and higher if i keep pushing the gas. I bought the intercooler piping as well, so it bolted right up to the blow off valve (dont know if this matters..). But i double checked all the hoses and what not and i can't figure it out. I have the tube coming off the blow off valve going to the right place, and everything seems to be tight. Do i need a boost controller since i have a new blow off valve? Or is there something i'm missing? Please help.

CivilEclipse

 

[civileclipse]

... i'm going to flip out. I got the new boost controller.. and I hooked it up the way I had my stock setup, but instead of the stock boost sylenoid, I replaced it with the aftermarket MBC. The blow off valve sounded good, but it was still boosting to no end.. Then I reconnected the T to the line coming off my blow off valve, to the T on the line from the wastegate, and now i can only boost to 10PSI, regardless of what I did with the MBC.. I'm thinking of just starting over from scratch and replacing all the lines and what not, perhaps somone has a good site showing how to do this, and maybe if I retrace my steps I can see whats wrong.. or maybe someone has the solution..

 

[92awddsm]

... i'm going to flip out. I got the new boost controller.. and I hooked it up the way I had my stock setup, but instead of the stock boost sylenoid, I replaced it with the aftermarket MBC. The blow off valve sounded good, but it was still boosting to no end.. Then I reconnected the T to the line coming off my blow off valve, to the T on the line from the wastegate, and now i can only boost to 10PSI, regardless of what I did with the MBC.. I'm thinking of just starting over from scratch and replacing all the lines and what not, perhaps somone has a good site showing how to do this, and maybe if I retrace my steps I can see whats wrong.. or maybe someone has the solution..

Try this. http://www.darklightning.com/gi/mbc.htm

 

[JoeyJigglesGSX]

i know its a really an easy job...and i actually did mine myself. But just take it to a pro at a shop and just let them deal with it. And when it doesn't work just let them figure it out. So less stressful. I mean i did it the easy way and then when i had my turbo put on they tapped into my lower intercooler pipe and did it a more efficient way.

 

[civileclipse]

Hey thanks man for that site, that really helps.. My only question after that is.. the small hose coming off my cold air intake (blue hose in the picture) was going into my boost sylenoid before.. where do I reroute that to or do I just block it off?

 

[Bostedquest]

OK...

you only need 2 lines 1 tee.

You need a line of pressurized air source to go to the In port of the MBC.
The OUT port of the MBC get T'd and hooked to the WG actuator, and the BOV.

Your done. That line on the intake, plug it. Your eliminating the stock BCS totally. If you leave it open, it will allow in unmetered air giving you idle fits later.
Now if you want, you can IM me and I can tell you how to make a dual (or more) boost control setup.

 

[92awddsm]

Hey thanks man for that site, that really helps.. My only question after that is.. the small hose coming off my cold air intake (blue hose in the picture) was going into my boost sylenoid before.. where do I reroute that to or do I just block it off?

You are going to block it off and the boost solenoid should have no hoses going to it at all. The new boost controller will completely rplace the solenoid. Just make sure it is hooked up just like the diagram in the link shows. You also need to leave the wire pluged into the soleniod to prevent any cel's.

 

[civileclipse]

Thanks a lot.. : ) I'm going to try this today, i'll keep you guys posted.

 

[rowlex]

EDIT: sorry I didn't read ALL the messages posted in this thread. After i posted i re-read one of your posts that said you could only boost 10psi. I'll leave my previous post JIC.

I had this same exact problem. On my stock BOV/tubing setup I could run my evoIII 16g all day long at 12 PSI.

As soon as i upgraded the piping and the BOV i couldnt hold boost no matter what I did.

whats happenning is you are CREEPING, before you installed the new BOV, your stock BOV was leaking QUITE a bit keeping your boost low.

You have to do something to cure the boost creep: IE: porting or an external wastegate.

 

[GZ-Rahvin]

i dunno when i ditched my dejon mbc due to not being able to control boost properly..i bought a Joe p and my boost issues are gone..i had the same problem of uncontrollable boost

only thing i can think of is back that mbc screw out ALL the way till its about to fall out..then give it like 2-3 half turns back in and go from there.

 

[civileclipse]

Well, I finally figured it out. I hooked up the MBC like it showed on the link a couple posts above, and plugged the outlet coming off the cold air intake and it worked great I messed with the MBC for a little bit and settled at about 13-14psi, and the blow off valve had a nice high pitch to it.. exactly what I was looking for. I want to thank everyone that posted and helped me out, I really appreciate it.



Here's a recent pic..