ok so i finally got it all in and connected. took everyones advice.

i have the tube from the wastegate going to the side of the forge mbc.
i have the tube from the turbo outlet going to the bottom of the forge mbc
i have capped all the nipples.

now im boosting only 14psi max... should i change the spring what should i do?

help!!

 

Keep turning it up until you reach 20psi,

Come back into the house and post here if you still have the same problem and we'll take it from there.

Good luck

Sounds like the spring and ball inde the MBC is not seated properly. Your WG is getting the 'open' signal venting through the controller

 

You have to turn it up and your boost will respond, do a little at a time until you get your desired boost level

 

the plumbing is wrong, you're only running on the wastegate spring. check the installs/how-to section and there is a good writeup with pictures to help you get it plumbed correctly.

YMMV,

Greg

 

oh trust me ive read everything carefully. and what do you mean the wastegate spring? i got all the tubes where they needed to go..

ive tried turning the mbc all the way to the + and it still stays at 14 psi.

im just trying to think which plumming is wrong? do i have the tubes mixed up? =( darn lol

 

I had the same issue with my Hallman MBC. I had to put the stiff spring in the MBC to go above 14psi

 

If it were backwards there would be Zero control of boost

You can troubleshoot to see if it is infact your MBC spring by taking the MBC out, hook an air compressor to it and see what psi the MBC starts to vent out the output. 0 - 14psi = bad spring, 20psi something else

 

well i turned the mbc to the + a mess load of times and it finally started rising the boost...so i think i just need i just need to keep tweeking with it. the boost seems to rise but it's not as smooth from what im noticing...but it will get to about 18psi. im trying to get it to about 20.

another issue that i encountered...is my SRS light and check engine light is on is there something that i unplugged while i was down there?

 

Are you running any type of fuel manager, if not your MAF is probably reading the overboost and causing your light

 

+1

 

no fuel manager at all. isnt the SRS light though for your airbag?

anyone know how much psi is gained with one click on the forge mbc?

 

Man, you are just a mess!! I thought you told us before that you had it turned all the way down but were only getting 14psi. Are you now taking that back and saying that you had room to turn it more? Ok, then you just keep turning until you get to the desired boost level.

No, you should have no CELs. If you got one from this installation, it means you probably didn't hook up one of the connectors. So, what I would suggest is that you turn the boost way back down (remember how many revolutions), and then look for dangling connectors. The two main ones to look for are the MAF plug (plugs into the bottom of the airbox) and the Boost Control Solenoid (BCS) connector. Even though you are no longer using the BCS, you still have to keep it plugged in so that the ECU _thinks_ that it is controlling boost. Many people leave this unplugged. Once you find the plug, plug it in, then disconnect the negative battery terminal for a few minutes. Reconnect it, start up the car, ensure the CEL is gone and that it doesn't return. Go drive around without boosting for a while, and if it doesn't come back on, then resume the boost tuning.

 

haha yea i am a mess...basically this is what is happening...when i turn it all the way to the left it has an end. but if i turn it to the right it can go on endless.

at all the way to the left it's boosting 14psi...but as i turned it to the right 3 full rotations (alot more than i expected) it rose to about 17-18 psi. so im think that's been solved ill check that again after work.

my CEL and my SRS light is on. not exactly sure what SRS stands for but i think it's for the airbag i think?

the tubing that connected to the MAF was connected to the wastegate solenoid. i thought all i had to do was cap off the 3 nipples and be done with it. which is what i did. so now i have 3 capped nipples, a mbc that has 1 tube from the wastegate and 1 tube from the turbo outlet.

which nipple is that BCS? and i know i nippled the MAF.

 

I was talking about connectors, not nipples or hoses. The place where you put 2 caps on 2 nipples was the Boost Control Solenoid (BCS). It ALSO has an ELECTRICAL CONNECTOR that must still be connected. Likewise, the MAF has to be plugged in. There is another electrical connector (much larger than the BCS) that plugs into the bottom/side of the stock airbox. I have plugged this one back in before but pushed hard enough and the CEL came on.

Ok, you are now saying that you had it turned all the way to the (-), not the (+). You first told us you turned it all the way to the (+) and got 14. Are you just having trouble with the arrows on the MBC? I have a Hallman, so I don't know if the Forge is opposite or not. With the Hallman, turning "left" (counterclockwise) means lowering the boost; turning "right" (clockwise) means increasing. Usually, you start all the way to the left, which means minimum boost (should be 11, not 14), and then you gradually turn it right until the boost climbs. If your gauge reads 14 when the boost is turned all the way down, I'd be concerned that your boost gauge is inaccurate. Hopefully, other Forge UNOS owners can chime in...

 

Poor guy.


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