I could use some help people! I have dyno time setup at Buschur Racing this Saturday the 26th. Here is the story as well as I can tell it. I just recently installed a Buschur Race FMIC w/ BR upper and lower hard pipes, as well as a BR intake. Install went really well and everything came out perfect. Since the install I have had ZERO control over my boost. I have turned my MBC all the way down, checked my lines, etc over and over again. I see 21 - 22 psi then fuel cut each time. I even pulled apart the MBC and everything seems ok.

Before the install here where my mods:

- BR 3" TBE w/ testpipe and bullet muffler
- BR o2 Housing
- BR cast jet coated OEM manifold
- BR cone filter
- Forge Unos MBC

With these mods I was able to use my MBC to control boost and was able to spike to 21 and hold 19 to redline. I had to turn my MBC up 24 clicks to get to this level of boost.


New mods added:

- BR Race FMIC
- BR Upper & Lower hard pipes
- BR intake pipe
- BR mini battery

I have the vacuum line running from the wastegate actuator to the side of the MBC. And I have a vacuum line run off of a 'T' from the hose running from the intake manifold to the blow off valve to the bottom of the MBC. Just as before, the OEM boost controller is plugged in and both ports with caps on them.

I have a Walbro 255 ready to install before the dyno. I want to get all of this taken care of. I have really thought about going with a EBC. I'm not liking this MBC at all right now. I don't know if the issue is because I am pulling boost pressure from the intake manifold now instead of the outlet pipe of the turbo. I have thought about tapping a vacuum nipple to the outlet pipe right off of the turbo.

Please help me

 

Try installing your boost controller the correct way. You shouldn't be using the vac line at the intake manifold but you should be using the outllet from the compressor houising. That is the way FORGE recommends to install their boost controller. You may want to try that first. Don't care if it worked OK before. It was still installed "wrong."

 

'Before' it was run into the nipple on the outlet pipe of the turbo. The Buschur licp does NOT have a nipple to run a van line off of. So...per BR I was told to T into the vac line running from the intake manfiold to the bov. make sense? I can't install it the 'correct' way when there is nothing on the outlet pipe to tape into.

 

I'm sorry if I was unclear at all but who said anything about an outlet pipe or LICP. I said it was recommended to install it on the compressor housing. The nipple outlet on the compressor housing. That's the way FORGE recommends to install it.

 

What do you think I should do then? You and I both know on an OEM IX turbo there is no nipple outlet on the compressor housing. IMO the next and easiest place would be to install one one right off of the compressor on the outlet pipe.

 

Please forgive me as I was mistaken. I was refering to the nipple on the black compressor outlet pipe. Its in the how-to section under forge mbc install. Again, sorry for the confusion. Goodluck.

 

This is what to do

#1 - first test - connect direct boost from manifold to the wastgate actuator

If the car goes over spring pressure - around 15 psi - and still hits 21 and then fuel cut this means your wastgate is not working

Bad wastegate can be A interferance or B bad diapram - take off the rod and see if the gate flapper swings freely in the 02 housing (sometimes things get hung up)

#2 if the car stays on spring pressure - then either A mbc defective or B mbc misintalled

Hope this helps

If all else fails call Dan Buschur and make an appointment for him to go over the car friday am

440-839-1900

 

This is what to do

#1 - first test - connect direct boost from manifold to the wastgate actuator

If the car goes over spring pressure - around 15 psi - and still hits 21 and then fuel cut this means your wastgate is not working

Bad wastegate can be A interferance or B bad diapram - take off the rod and see if the gate flapper swings freely in the 02 housing (sometimes things get hung up)

#2 if the car stays on spring pressure - then either A mbc defective or B mbc misintalled

Hope this helps

If all else fails call Dan Buschur and make an appointment for him to go over the car friday am

440-839-1900

 

This is what to do

#1 - first test - connect direct boost from manifold to the wastgate actuator

If the car goes over spring pressure - around 15 psi - and still hits 21 and then fuel cut this means your wastgate is not working

Bad wastegate can be A interferance or B bad diapram - take off the rod and see if the gate flapper swings freely in the 02 housing (sometimes things get hung up)

#2 if the car stays on spring pressure - then either A mbc defective or B mbc misintalled

Hope this helps

If all else fails call Dan Buschur and make an appointment for him to go over the car friday am

440-839-1900

 

Trippleee Post ^ haha

 

Al,


Last night I did run a line directly from the 'T' off of the BOV right to the wastegate. 2nd gear pull - Hit 15 and went up slowly to around 17 by redline - 3rd gear same thing but maybe saw 18. Did another pull from the top of 3rd into 4th and boost went even higher 19...20...21....cut.

My car is a 06 IX with a hair over 5k miles on it. The wastegate isn't that old and I have only taken it off of the turbo once to make room to get my hands in there to install the Buschur LICP.

Is there a way to tell if the wastegate is bad? Or to test it off of the car?



Also....the how to and BR have different opinions on how the Forge MBC should be installed. Does the vac line running off of the wastegate go into the side or the bottom of the MBC? EvoM howto says side, BR says bottom. I honestly don't remember which way I had it installed before I did the FMIC. All I know is that it worked and worked well before the install.


Thanks!!!

 

Well tonight I took everything off and re-ran brand new vac lines, checked connections, etc...I even pulled off the wastegate off and everything seemed to move freely. I put low 10-20 psi into the wastegate using my air compressor and the wastegate rod seems to move freely as well. Went out for a drive again with my MBC turned all the way down and same thing. I can't keep this thing under 20 psi.

I have NOT installed my fuel pump yet, do you think the car is running out of fuel maybe and hitting fuel cut? The thing that bothers me is that I do not have any control over boost anymore no matter what I do.

I'm trying to get hold of another MBC to try out.

Anymore ideas people? Al? Thanks....

 

have you done a pressure test? follow al's advice and go from there... if you havent tested the lines for a leak, you will never get full boost... you should hit about 10-11 psi with your BC turned all the way down. slowly adjust your BC after you have turned it all the way down. are you running MAF or Speed Density?

 

O I get full boost...There are no boost leaks.

 

Take your boost controller apart and make sure the ball inside isn't sticking. It seems that this has been happening quite a bit these days. Goodluck.

Ps. Make sure you don't loose the ball. LOL