E316 + MBC = no boost???

[99GSX_emily]

The website will only let me post in the newbie forum, so i appoligize for not posting in proper spot.

Anyways, I recently got a Hallman MBC & I wanted to up the boost from ~11psi to about ~14psi on my E316. I've hooked the MBC up acordingly (T in the bov/intake hose to the MBC to the WGA). the problem lies somewhere i can't figure out ofcourse. But I'm leaning towards a wastegate problem. Basically the turbo is spooling (you can hear it) the boost gauge is showing boost creeping all the way to ~20psi then i left off ### i don't want to hit fuel cut. & the BOV is deverting (very soft though) BUT the turbo isn't pulling. It's like driving an NA with a turbo sounding motor with no pressure pushing the car forward. It doesn't make sense to me, everything is hooked up accordingly & no boost leaks everything to my knowledge has been capped, yet the turbo isn't creating any power. Wastegate isn't opening or turbo seized???

Supporting mods:
2.5 turbo back
255hp fuel pump
FMIC
Stock injectors

I would apprecitate help of any sort

 

[DSM_ThuNDeR]

check the actuator arm is hooked on to the wastegate flapper.

The lil clip that holds the actuator on the flapper fell off on my friends 2g the other day and could not build any boost and was driving him crazy! When we found out what it was he felt really dumb.

If thats not the case, u hooked your mbc the wrong way. Try switching your vac lines around.

 

[targett27]

Check for boost leaks, always a good place to start.

 

[jjrock5]

This probably won't fix your problem but you shouldn't hook up a MBC by teeing into the bov line.

 

[DSM_ThuNDeR]

This probably won't fix your problem but you shouldn't hook up a MBC by teeing into the bov line.

yeah that's right, but he should still be able to make it work.

If you want to relocate your boost source for the mbc tap or weld a nipple on your lower intercooler pipe or J pipe.

 

[99GSX_emily]

I currently have my boost source in the bov line to the intake manifold & it ain't working as you can see. I already have a nipple sticking out of my lower intercooler pipe, i can relocate the socure to there & try it that way. And i'll check for the clip on the WGA when i get home & the lines on the MBC its self are on the correct way i checked that about 8 times ### i know i would do it backwards if wanything (@ work right now -.-)

 

[Bluefire16]

^^ Well this is a problem and this is wrong. The line that comes off your BOV and goes to the Intake Manifold, should be LEFT ALONE.

If you insist on doing it this way, you can, its not recommended however. Now, if your wastegate isnt staying shut, this will cause the lag or lack of boost sometimes. There is a trick to "shim" the wastegate, you first need to find out if the wastegate is the problem.

Next check for boost leaks. This is most likely your problem, but do it correctly. Dont just "look" for a leak or a hole. You actually need to do a proper test.

Lastly, get rid of the MBC for the time being. Hook up the wastegate to the the nipple off the turbo, or the j pipe.

 

[99GSX_emily]

The WGA does still have the pin in it, i've hooked the MBC using the lower intercooler pipe to the MBC then to the WGA & still the same problem the mainfold is mesureing pressure but the car is still not pulling its just poking along like a 420A. Last time i ran a boost leak test was when i put the 16g in which was about 3months ago now & just a couple whistle sounds from the stock tubing. I should mention is boost fine with the BCS but once i hooked up the MBC this started to happen. Would heat mess up the MBC?? i have it located above my radiator & its pretty warm when i touch it?

EDIT: Well it probably is a boost leak, the car is in limp mode 24/7 now & can't keep it's self on. I gotta get my hands on a air compressor then i'll get back to y'all with a verdit! Thanks guys!

 

[Bluefire16]

^^ Your welcome, get back to us after the BLT. Like i stated, im guessing it is a leak. If its in limp mode that could be other issues, just not a boost leak.

Is your car auto matic or manual? If automatic it will only drive in 3 gears and that's why it feels so sluggish. And there are many possible things that could be the cause. Start with checking fuses and relays.

 

[99GSX_emily]

^^ Your welcome, get back to us after the BLT. Like i stated, im guessing it is a leak. If its in limp mode that could be other issues, just not a boost leak.

Is your car auto matic or manual? If automatic it will only drive in 3 gears and that's why it feels so sluggish. And there are many possible things that could be the cause. Start with checking fuses and relays.

YouTube - evo x going into limp mode (HELP ME)

Here's a video to better disscribe (its a 4b11 but oh well) & it's limps at around between 500rpms-0rpms at "idle". When driving (i took her out for a couple minutes) it showed same problems as it would when my intercooler pipe pops off, going now fast & staying under 3,000rpms, it didn't hit me at first untill you said it but i do believe it is a leak. All fuses & relays are all intact. It is a POS automatic & tell me about 3rd gear driving..it's my favorite

I'm waiting for my buddy to get off work so i can use his air compressor so i can blt this poor girl. I'll report back with finding/fixes tonite. Again thanks for the insights

 

[Jt_4g63]

Wastegate stuck open

 

[my dreamt dsm]

What i have is top of hallman mbc going to wastegate. Lower which is input goes to turbo housing. You should avoid t-ing the bov. I am having the same problem with hella turbo sound but no go. I think my clutch is slipping though.

 

[Bluefire16]

^^ Guys we have already gone over this and discovered the route of the "new problem"

A boost leak will not be the cause for the car to be in limp mode. Do you have any codes being thrown?

And this is in a Evo X? Not a DSM?

This could make things a little different.

 

[1gdsmftw]

sounds to me like hes got the t part of the boost controller backwards

try swapping the t around and see what happens

 

[99GSX_emily]

^^ Guys we have already gone over this and discovered the route of the "new problem"

A boost leak will not be the cause for the car to be in limp mode. Do you have any codes being thrown?

And this is in a Evo X? Not a DSM?

This could make things a little different.

Sorry, i do drive a GSX, the evo x was just the quickest video i found. I did find one boost leak (boost source hose & one of my couplers. I replaced & tightened all couplers on the intercooler) but the air compressor i used could barley hit 5psi so i'm sure theirs more in there. As far as the limp mode goes it hasn't returned since i fixed that. I get off work here in 20minutes & i'm gonna up the boost to ~14psi again & see if my car actually goes anywhere. Is their anyway to see of the wastegate is functional without taking the turbo out???

 

[1gdsmftw]

wastegate bolts to the turbo u can take it off the car without taking the turbo off