Hks BOV question! Very important

Ok, please dont hate me. I did get a BOV. I bolt on and now when i rev up and let go of the gas i think i am getting compressor surge. A fluttering sound coming from somewhere near the turbo. There is no air coming out of the BOV? What did i do wrong here?
Thanks, Taras

 

Is it a real HKS one or a copy cat?

 

what vaccume line did you hook to the bov?

 

mine has a problem like this also, it does not blow off all the time. does your hks have the screw on the back for adjustment? if so let it out a bit. mines as loose as it can be and still does not work right.

 

i capped the recirc line with a cap that was provided and connected a line that went from bvp to bov. I think it is really bad if it is not letting the air out. Its is a real thing i got it of nasioc. It has hks printed on it.

 

This is from WRXfanatics (Ej20) Jeremy on the HKS BOV:

The install is very straight-forward, but you should read up a bit on why the WRX runs so much better with the stock valve. Actually, I'll just paste it below...

This is why: The stock valve is a recirculation valve. All of the air it bypasses gets sent right back into the intake and then into the engine. The thing is that it gets sent back into the intake after the MAF sensor so it's not actually measured. The ECU just assumes that it's getting all of that air back into the engine. So when you swap on an aftermarket BOV that vents all of that air into the atmosphere, obviously none of it's going back. However, the ECU doesn't know this so it's still injecting fuel for all of that air. This causes a brief rich condition every time the BOV does its thing. It's not really a big deal, but these are the side effects:

-- slight hesitation while the car burns off that extra fuel. Most people can't even feel this and it depends a lot on your driving style. Certain BOV's are worse than others in this regard, but even the worst one isn't that bad so if you really, really need the psssshh sound you may want to just bit the bullet on this one.
-- Afterfiring. This one you're going to have if you get an atmospheric valve. That extra fuel is going to burn in your exhaust, and it will cause a popping sound. If you're catless, it's gonna be fairly loud and might get annoying after a while. Some people like it, I found it annoying. If you have cats you may not really notice it, but that means the cats are destroying all of that extra fuel and are going to break down and need replacement sooner than they would otherwise.
-- Idle problems. This I don't really attribute with a general BOV problem, it's really a problem with a poorly-tuned BOV. However, lots and lots of people have problems with the car's idle when they put an aftermarket valve on so it's gotta be mentioned. Obviously if your car doesn't idle right it's a big problem.

Bottom line is that the stock valve is, by far, the best. The car runs and performs the best with it. It is good up to 18 to 20 psi. If you're running less, you DO NOT need to replace it. Anybody that tells you a BOV is a performance mod on the WRX is wrong. 50/50 and adjustable valves cause less problems than totally atmospheric ones, but the stocker still wins out for performance. It's even semi-noisy if you remove the intake silencer and pop a nicer panel filter like an ITG in there. I can hear mine echo off walls and stuff...

and a quote from SonicSubie who ran the HKS for a long, long time:

QUOTE
I took the BOV off, I really forgot how much better the car runs.






...but if you are looking for the sound then do it . I'd suggest buying used since you can get amazing deals and there are LOTS for sale. Also if you decide it's not for you, you can resell it for the same $$$ you bought it for.

Jeremy

 

make sure nothings blockin the inlet to the BOV. and check the tension on the Hard/Soft Screw

 

yeah, i know that. I have read all of this stuff long time ago. I still wanted to try tho.


I did loosen the screw all the way but i still get that blow off sound from where the turbo is.

 

Nothing is blocking it. And the screw is loose.

 

Taras look inside the BOV if it says super suquential then its real if its says blow off vavle then its a knock off. Also the real ones know do not have a screw in the back of it. However the frist gen HKS BOV did have a screw in the back. If you are not doing anything you could drop by the dealership at White Bear Lake Subaru.

 

Then id go with what erik said and check the hose... maybe its not getting vac.

 

^agree...make sure their is no kinks and leaks...

 

Checked. Put the stock on on and everything is fine. I think there is a problem in the bov itself. its not a knock of its real its does say super sequential and it is purple and gold. Its first gen with a screw i think the spring on it is too tight.

 

That could be a good idea. are you there right now?

 

next time taras....Listen and listen well when members are trying to help u out...later on everyone here is just not gonna care anymore when u can't listen to what they are suggesting and saying to u...

 

Maybe its seal is old and is seized shut

 

he is here til 9pm today

 

I listen to you and other members. Thats why i did not get a car from WMC. I wanted to try a bov just for a short time. I have no idea why its not letting out pressure. So i will stop by at the dealership right now.

That could be, but i took it apart and it looks like its working fine. Just a little tight.

 

taras...it isn't just from WMC...it is also your mods you are doing to your car...

 

Peter is working with a customer right now...dunno if he would have time right now for you...it is up to u if you still want to come down...

 

ok, me and sheen looked at the bov and installed it again and sheen said that it makes the car surge. it might be that the spring on the bov is too tight

 

here is a mine piece of my mind yO.....not in the bad way....if you don't know anything what you are doing, I won't be touch anything unless you know whay you're doing. You ask for trouble. It takes a lot of research and sources in order to be mastered. As mnsubaru concern, it's a great resources and the members are please to help you in any situations.....Don't make it a same mistake what i did.....( thanks to Brian Shorten for chewing my --ARSCH) lol...

f1rst....get to know your vehicle
s2cond....improve your driving skills
th3rd....stages, research what power you want...int2rw3b rules
fou4th...read the STCKY STICKY STICKY
i think that's all

hope my engrish is ok....nate what you think? (^_^)
Good luck BTW
tbone out yO!!!!

 

^the Bone Speaks
:bowdown: :bowdown: :bowdown: :bowdown:
:bowdown: :bowdown: :bowdown: :bowdown:

 

Just a question ... what did you hope to get out of a BOV??

 

easy....*PPPPPPPPHHHHHHHHHHHHHSSSSSSSSSSSSS* Baaaahhhh WwwwwUUUUSSSSSHHHHhhhhh

 

pretty much that.

I just took it apart and it look like it was all corroded on the inside and the little orange valve on the inside was not letting the air thorough. I fixed that so, i will try it again.

 

it could be ur gasket between the intercooler and bov...i had to replace mines..

 

where did you get your gasket? I dont think thats the problem. In my situation its not leaking boost its actually not releasing it.

 

subaru parts store?

 

i bought mines from brian in BP

 

that makes sense. Are you sure you dont get compressor surge with your hks?

 

Well, after some research i found out that HKS bov is poo and breaks all the time. Lots of people get compressor surge with it because of it quiting to blow off. Bad idea to buy one. Oh well at least now i know what the problem was.

 

5. intranets gangsta engrish sucks don't use it ha hah a there ya go T

 

Mine works just fine. That valve can hold more PSI than you'll ever be able to push, and I blame it more on the fact that you bought it used and it's the first gen.

I have the second gen, and so does RallySTi, and neither of us have any issues. Don't blame a company that is known for quality parts, and has been around before you were a twinkle in your daddy's eye.

 

My HKS bov runs fine. I dont remember if I had my car tuned before or after I put the bov on but it gave me no problem(4-5months now). Works as it should when there's even boost to blow off the air(about 3k rpm)(with stage1 tuned).

 

the damn gasket will prob run like $20 though ( i think i need one though so lemme know what it costs)

 

the land mines of course :laugh:

 

screw that bov stuff. With that surge yesterday i had to take the intercooler of the brackets like 3 times to get the bpv back on. I will just sell it

 

if it is not working well, then dont do a WMC and sell something that dont work right!!!! throw it away and count your losses....

 

or give it to someone who can maybe fix it

 

haha noobs