hallman is one of the best out there i would get the boost leak test done before you go and change out the MBC. just my 2 cents

 

check all the vac lines....especially the one to the fuel pressure regulator and bov

 

Stop reading too deep into this. Just because you crank the **** out of your MBC doesn't mean it's going to do anything extra. 15 PSI is probably just around the point that breaks through the threshold and truely becomes a LEAK.

I would almost be willing to bet that it is your BOV. it's the only thing that makes sense at this point. It's the only part of the intake that you took off, tampered with, and then put back on. Now you've got a problem with your intake path. I'd really look at your BOV a bit closer, instead of just assuming that the sanding and painting didn't do anything to the airtight seal that it provides.

 

trust me bro i looked over the bov!my dsm buddy said its most likely that so i looked it over last nite...and i checked it and checked it over and over!!there is no cracked seal etc...

i just called my buddy who knows a lot about cars...and said if you do crank the mbc it should read more...and he said mbc have **** the bed on people hes known before...its kinda like a walbro fuel pump...great product but they will go **** up on you with no notice

but what does my friend know,he only has a 9 sec viper and 515awhp pump gas 18psi 3000gt...

 

Your friend might be right. Who knows. I gave you info based on what I thought it could be, diagnosing a car with a couple of symptoms and only one variable. It would be very strange to me that your MBC would have just stopped working as soon as you played with your BOV. However, stranger things have happened.

If you do indeed find out that it's your MBC, I have a black Hallman Pro RX sitting here brand new in the box (with both soft and heavy springs) that I could send out to you.

 

I know alot about cars too. Put a different bov on the car and check. When you punched it it helped remember? Your bov may not be holding boost man so try that. I dont think that you taking your bov off made the MBC fail. It worked fine before you took the bov off. Only thing to do is to CHECK THE BOV.
DO a boost leak down test.

 

Dude im having this same problem and just made a post bout it. Only difference is mine is boostin 17psi. Also have the Hallman. If you figure anything out please pm me and i will do the same for you!

 

Maybe the spring inside ur MBC has no tension. If there is no tension on that spring you can crank on it til its tight it wont matter cause there is no tension so no boost. That is a quick fix. It happend to me.

 

ok update...

i used my buddys turbo xs mbc and same problem...sorry i have checked over the bov and found nothing...now it does sound like its leaking from the area the bov is at...but it is is...trust me on that...could the spring inside get jacked up?all i did was take off clamp,take off bov...sand,primer,paint...put back on flange and clamp down...

i have no clue where to start..i put all new vacuum lines,and vacuum tee...still nothing...

what can i do to test bov?how can i fix it?

sorry for maybe not listening but the bov is on so i never thought it could be that...but yes i agree it makes sense since i took it off...


HELP PLEASE...10PSI ON A 35R IS GAY!AND I GOT A BIG RACE WKEND COMING UP

 

so how can i check a boost controller for problems?

i used my friends turbo xs and cranked it and it felt like it held a little now that i think bout it but i use to have a turboxs and that thing sucked...

anyways if its not my boost controller,al my vacuum lines are on and BRAND NEW with vac tee,my bov is on all the way!what could be the problem?

can a valve cover give a boost leak??my dsm buddy said that it can...but i was thinking if i had a crack wouldnt i have had a boost leak before this?

PLEASE HELP!!IVE TRYED EVERYTHING...LET ME KNOW ANYTHING ELSE I MAY NEED TO CHECK OVER..IVE DONE IT ALL...

How can i make sure the tial bov is on fully?there seems to be no loose/cracked seals...please help!!

also whats the easiest way to do a boost leak test?what do i need?thanks

 

I have a feeling it's ur Bov, you should change ur bov to see what happen's. I had

the same problem once... my boost would spike up and then drop and hold @ 15

psi. After I checked everything and made sure all lines and clamps where tight

I was still only holding @ 15psi. Finally I changed the Bov and *WALA* boost was

holding @ 21psi again. So if I was you I would change the Bov out to see what

happen's.

 

My personal Expeirence is your problem is where you were previously working, I know tials are adjustable So if you played with the screw its out of adjustment, tighten the scre w down on you tial BOV. cound how many threads this way you can put it back. BTW i would trust the hallman Over everything else, its the least likely to fail. But Change it if you must, go with another hallman.

 

a boost leak test will check your BOV as well as all the other connections in your intake track. trust me, if you've never done one before, you'll probrably have more leaks than just the BOV. you go to home depot, pick up a plumbing coupling that matches the size of your turbo inlet(they're black with clamps on both sides), a PVC cap to fit in one end of that. then drill a hole in the cap and either get a valve that a bike pump will attach to or an air compressor(if using a compressor, i'd get a regulator with a gauge so you don't overboost it), drill a hole in the cap and screw whatever valve you choose in there with teflon paste or tape. then put it on the inlet of the turbo and pressurize with the TB open and feel/listen for leaks.

 

ok thanks...but if my tial is on why would it leak?its probably the best bov out there...it sounds like its coming from the bov but the damn thing is on...ill keep checking

 

what else could be wrong with the bov?the line is connected,its on the flange and the clamp is tight..

when i start to give it gas i can hear the leak from bov area...so what could it be...the thing is on there good...