Bov problems!!!
 

I have been doing a ton of reading on here and could not find out what to do. My bov it not working at all. The only noise I hear is compressor surge. I took the bov off and can push it in by hand. I had the screw on soft and hard and everywhere inbetween. I pulled the vacuum hose off and there is vacuum there.. maybe not enough?? I called greddy cuz it is a greddy type rs... they want me to send it to them so they can look at it... but i would rather not send it out if I dont have to. I am running the bov with a front mount. Does anybody have any ideas of what i can do. I really dont want to send it out if I could figure it out myself. Please give me your ideas guys.. I really need your help!!!

Ouch.

My suggestion would be to take it to a turbocharging shop asap if you're not prepared to send it away rather than waiting for someone to post, sounds like something you'd have to see to work it out, but forgive me if I'm wrong.

Take it to a turbo/performance shop or bite the bullet and send it: Because compressor surge is just lovely for your turbo :scared:

Ditch the noisemaker all together. There are a few LONG threads on whether or not you need it. I haven't been running one for awhile now with my hybrid and FMIC and haven't sheared any shafts.

I put on another bov from my buddys 7 which i know works and is pretty loud and that one lets out a little bit of air on my 7.... i tried adjusting it but still get alot of surge and the bov seems like its not venting enuff. I am at such a loss for words now... I dont know what the problem is

there are only a couple of reasons a BOV doesn't work...

1. vacuum diaphram/chamber has a hole in it
2. siezed up
3. connected to the wrong vacuum source

I am suspecting that you have the wrong source... a prefered source would be somewhere after the throttle plates on the primary intake curcuit, I would try placing a 'T' fitting on the MAP sensor vacuum line for the source

I took the hose right off of my boost gauge... i figured that would be fine

I know there is good vacuum cuz i used my boost gauge hose... and I know the bov is good cuz I took it off my friends car and I know it works. Please help guys!!!!

post a picture where your boost guage is going to

My boost gauge hose is running from the bottom nipple on the back side of the intake... the two obove that are blocked off. But the guy i got the car from has a t fitting off of that bottom nipple and it runs my boost gauge and fuel pressure reg. I first had the bov hooked up to a vacuum tube that was coming off the front of the intake manifold.

any other thoughts on this problem??? I have no ideas at this point

a picture is gonna be the best way for us to diagnose the problem. i have the exact same setup and had the same BOV and i had this same problem for a while and i found out i had the wrong source.

Ok I will try to get some pics... hopefully they will be up soon

I bet you are pulling vacuum from before the butterflies.

Well I was gonna put some pics on here.. but to tell you the truth I have no idea how to do it. I tried but did not work very well. All I can say is the bov is going to the bottom nipple on the front of the intake after the throttle body. My boost gauge and fuel pressure regulator are running off of the bottom nipple on the back of the intake right after the throttle body. Can anyone picture this?

Here are some pics First is a pic of my setup http://i225.photobucket.com/albums/d...llPics0001.jpg Next is a pic of the bov the regulator is hooked up to the bottom nipple in the next pic.. also on that is my boost gauge.http://i225.photobucket.com/albums/d...llPics0004.jpg Here is the bottom nipple runnin the reg and boost gaugehttp://i225.photobucket.com/albums/d...llPics0005.jpg Next is a pic of my bov tube hokked up to front of intake manifoldhttp://i225.photobucket.com/albums/d...llPics0003.jpg Next is where my bov tube goes tohttp://i225.photobucket.com/albums/d...llPics0002.jpg...... That is how the guy i got the car from had it. I took my bov hose and unpluged the boost gauge and hooked the bov up to that. Is this all wrong. Should I separate all of them. The bov is not doin anything... well my buddys that I put on did a little somethin but was no strong.. it was real weak... PLEASE HELP GUYS!!!!

Hopefully someone has a few thoughts

:icon_tup:

http://www.ausrotary.com/viewtopic.php?t=17113

take better pictures man. those are all chopped off.

It is the only way that I could show where the tubes were going was to get close pics. The last pic is under the front of the UIM. The pic above that goes from my bov to the front of th UIM.... (the blue tube in the front of the UIM). The pic before that is the back side of the UIM right after the throttle body... you can see the throttle cable in the pic. And the pic before that with the black T fitting.... the left hose goes to where the second pic shows.. the right hose off the T goes to my boost gauge and the bottom hose off the T goes to my fuel press reg. It was the only way I could show where tho hoses go... sorry guys.. I just want to solve this problem

Well it turns out that my bov is working somewhat. It does open and close. I have adjusted the screw and messed with it. I am still getting very bad compressor surge. My buddy seems to think that it is because of my exhaust. I have a full racing beat exhaust.. but after the down pipe I have got what looks like a muffler. My buddy told me to pull that out and put a piece of straight pipe there. Could that have been my surge problem??? Maybe due to the fact that I am pushing thru alot of air and the exhaust cant keep up and is pushin air thru the turbo????

I mean should I move the bov?? Will it be better to be over by the turbo and solve my surge problem?? If I have a problem tho I would like to solve it instead of just movin the bov.

I dont know what to do here?? I just want to drive my car!!!

YOU CAN DRIVE IT! your turbo will be fine. Its just a noisemaker.

Well I am sure that I can drive it but it just sounds sooooo bad. I mean my bov should be alot louder than it is... I mean the sound of bein loud is not a big deal... I dont care about the bov sound but knowing that it is not sounding the way it should and the bad surge leads me to believe there is something wrong but i could be wrong?? I just dont want to hurt anything.

Well personally I would never run it without the bov. All that air is just making your turbo stop very quick which from what Ive read is NO GOOD. You also might try to keep your vacuum hoses as short as possible. Your pics arent very clear but you should run it off the passenger side uim(right above the turbo) there is a fitting there.

The turbo stops very quickly anyway. It takes alot of power to drive it. The second you lift that engine is making nowhere near the power it needs to turn the thing. There is no load on the exhaust side. Its freewheeling, there is no force opposing it. You won't break anything.

I just dont like the way that surge is sounding. I just feel like the bov should be doing more than it is. It just seems like it is letting out very weak. Siguy2k do you have a pic of where I should run the vacuum hose to on pass side??

try a different hose

what do you mean by a different hose??

And that's just what BOV sellers want you to think, despite the lack of evidence that running without a BOV does any harm at all.

Go back up to post #17, click the link and read. It's long, but you might just learn something.

Yea I did read it and all it told me was that people have their own ideas on things. Personally what the hell is the point of risking wear and tear and possible breaking your turbo??? Just doesnt make sense to me. And there is a reason why you see more people with them than not. Why do stock turbo cars almost always have them???? Anyway to the OP I dont have my car right now but will try to find one and show you. On mine I think that its the only one back there. Its what I have my Bov, Boost gauge and boost controller running off of and have had no problems. Its just a little vacuum nipple right above the turbo on the UIM.

Here's a picture of a Block Off Plate I made with "extra" vacuum nipples. One goes to the boost sensor and the other to the blow-off valve...:)
http://i20.photobucket.com/albums/b2...7/IMG_0494.jpg

What doesn't make sense is that if running woithout a BOV is so dangerous then why are they almost completely absent from nearly all forms of top-level motorsport that allow turbos (endurance racing in particular)? Forget the argument that "they replace the turbo every race"; if such a simple and relatively cheap device could genuinely reduce the chance of turbo damage, they would be far more common. You talk about risk, but if it were genuine it's not a risk teams would take. IMO we're talking about a myth that has been blown way out of proportion, most likely in the interests of selling more over-priced aftermarket BOV's.

Because (a) all turbo'd cars made in the last two decades came with one and (b) for some reason a lot of people are obsessed with making wanky look-at-me noises. If they really were to prevent damage, then maximum flow would be the most important criteria. Instead people ask for (and manufacturers design for) maximum noise. I suspect a BOV engineered for maximum flow would be quieter than most aftermarket ones...

All manufacturers use recirculating BOV's for noise reduction, i.e. to prevent the very sound the OP is worried about. No because this is damaging anything, simply because it's an undesirable noise to most people. It evens states this in the FSM.

My old 12AT had no BOV for it's entire 20+ year life and yet its turbo lasted as long as any can be expected to and was eventually rebuilt for the same reason many are (oil seal). I disconnected the BOV on my RX-7 just to see what it sounded like and ran it like that for months. I swapped the turbo out for an upgraded S5 one recently, and despite never having been rebuild it's in excellent condition with no damage done in it's BOV-less time.

Good to see someone else finally do this. ;)

The only reason that I brought it up was I felf that there was something wrong with my car. I took the greddy bov off of my friends 7 wich I know makes a loud noise(letting out air with no surge) and put it on my car. It does not seem like it is as nearly effective on my car. I could care less about the sound it makes or whatever but with the surge issue it just sounds like if the bov was working right maybe I would not have the surge problem. I mean if it was just a little bit of surge maybe I would not worry as much but it seems like it is pretty bad.... maybe not?? The only reason I worry is because the bov does not seem to be doin what it should. Rather than say "well I dont need it anyway" i would like to try and find out why things are not working properly. I dont want to have to "deal" with a surge problem if I dont have to. I guess I want to be better safe than sorry?? Maybe I am wrong tho??

Help me guys... there has got to be someone who has had this problem before. Hopefully someone has some ideas cuz i got nothin

Ok I have some more info on this problem that I am havin. I might have been lookin in the wrong direction for this issue. My bov is working but just not all the well and loud. Turns out I am only boostin like 5 psi, which i believe is why my bov is not that loud. I thought there was a problem with the turbo because I was told by the guy I bought th car from that it was set a 13psi. I am on a microtech so maybe all my problems can be solved by a tune??? Could there be any other explanation for the problems I am havin?? Tell me what you guys think.

Any thoughts at all guys??? I would like to hear anything you have to say about this

^^^help^^^help^^^

Still lookin for some info guys. Just let me know anything that you think... what are your thoughts??

"""Ok I have some more info on this problem that I am havin. I might have been lookin in the wrong direction for this issue. My bov is working but just not all the well and loud. Turns out I am only boostin like 5 psi, which i believe is why my bov is not that loud. I thought there was a problem with the turbo because I was told by the guy I bought th car from that it was set a 13psi. I am on a microtech so maybe all my problems can be solved by a tune??? Could there be any other explanation for the problems I am havin?? Tell me what you guys think."""" Anything?????

You mean you don't have a boost gauge staring you in the face? :(

No not untill I put one in I didnt!!!

Sounds like the wategate is opening...... maybe you should um, adjust it with a boost controller.

Well thats what i am asking... do you guys think that by tuning the car my boost issues will be solved or do you think I have a different problem. The only reason I thought I had a bov issue was if it was boosting at 5 psi I was getting real bad surge.... maybe if I get it tuned to run where it should like 13lbs maybe my bov will work harder and have less surge??? Thats why I ask you guys... you have alot more knowledge than I do on this matter.

^^^^^^^...Well do you guys think that 5 psi is enough to cause that bad surge or any surge for that matter???

LOL I definitely read this thread title as "boy problems."
You all don't even wanna know what went through my head.

if you're running a microtech why not take the car to a dyno and have it tuned?the fuel maps might have been set a a certain level and might run too lean when the boost is turned up.might aswell kiss your motor goodbye when you start fiddling around w/ a manual boost controler w/o a wideband or a laptop to see what the base line tune is.or even knowing if the boost guage is even giving you a accurate reading.

Sorry to bring up an old thread, but I was wandering if this problem was every solved? I have the exact same problem. I just installed my FMIC and put the bov between the throttle body and intercooler. But my bov does not make any noise whatsoever. I have the bov connected to the UIM and i am pretty sure the hoses are connected right. When I had the TMIC with an HKS bov and it ran fine. And I am using the exact same source line that I used for that HKS and now the bov doesnt work... Any other ideas besides the ones written?

Anyone know what can cause this???

Bad bov?

Hose collapsing?

improper source?

turbo fubared and not boosting?

You tell us more about what the car is doing and you might get a responce.

Its practically the same as the original thread, but I'll let you know step by step what I did:

Well, I got my universal FMIC kit this past friday. I worked on it all weekend. Finished yesterday (tuesday). It cranked up normal, idle was fine, and so i let it warmup so that I can take it out for a spin. I used the exact same vaccum source that I used with the HKS that I had. I even checked to see if I had vaccum, which I do. Anyway, I let it warmup, and I revved it a little bit and didnt hear the BOV at all. I have an RFL bov btw. Anyway, then I revved it higher and nothing. Took it out for a test drive and it drove fine, boosted fine, but NO BOV whatsoever. So, I have no ideas what else it can be. I hooked up to the UIM nipple, and nothing...

Does this help?

Without being there for hands on diag, I would say bad BOV. Again that is assuming you have vacuum to it and the turbo is boosting

Is there a way to make sure the diaphragm is bad? Cause I can open it when the car is on, but it would die out. And its pretty easy to pull it up. (its an RFL) but when the vaccum is not connected it is definitely harder...

hmmmm..... hook a manuel vacuum pump to it and see if it stays open?

Yeah, it definitely doesnt open up at all, when I rev it. I just did it. I also sprayed carb+choke cleaner all over my hoses and couplers, etc to see if I can find a leak anywhere, and nothing... So I guess its gotta be the BOV. My question is, how does a BOV get stuck shut? It doesnt vent whatsoever. What would cause this?

Anyone? Well I found out that my wastegate was loose, and I tightened it and nothing... Anyone have any other ideas? PLEASE!