bov open at idle?

[arson]

i was fiddling around under the hood yesterday when i decided to watch my bov and rev at the same time. before i started, i could hear a small whistle coming from the engine, and found it coming out of the bov. this is at idle. here is a link to watch it: here (you can hear when i rev and when it drops back down to idle, and watch the leak)

 

[Turblown]

Yep... it does that.... that's why you need a small filter on it.... if you decide to let it go to atmosphere instead of re-circulate back to the intake tube.

 

[Mirage2LTurbo]

Yep... it does that.... that's why you need a small filter on it.... if you decide to let it go to atmosphere instead of re-circulate back to the intake tube.

You put filters on your BOV's?

Yes, my BOV opens at idle too

 

[CanadianTSi]

Yep... it does that.... that's why you need a small filter on it.... if you decide to let it go to atmosphere instead of re-circulate back to the intake tube.

WTF? a filter???

This is why you don't vent your BOV....

 

[Turblown]

WTF? a filter???

This is why you don't vent your BOV....

Yeah.... its only on a 1g BOV.... otherwise unfiltered (dirty) air can enter your intake through the BOV.... but aftermarket BOV's (Greddy, etc) don't leak at idle from what I understand.

 

[Defiant]

Just put the damned recirculation tube back on it.

Jesus.

 

[eclipsed95]

Just put the damned recirculation tube back on it.

Jesus.

Mine does the same thing with the recirc. on, what's that mean

 

[Mirage2LTurbo]

Yeah.... its only on a 1g BOV.... otherwise unfiltered (dirty) air can enter your intake through the BOV.... but aftermarket BOV's (Greddy, etc) don't leak at idle from what I understand.

It's not a leak at idle, my damn Tial 50 opens at idle. You don't need an air filter on your BOV, that's retarded. Put your recirc line on unless you're on a speed density setup.

 

[Defiant]

Mine does the same thing with the recirc. on, what's that mean

Only that not all your air's having to go through the turbine to get to the cylinders. So long as it's metered, as it will have been so long as you're recirculating, it's the way it's designed to work.

 

[Tallen]

Stock 1G and 2G BOV's can leak at idel, hence the "bad idle" when venting a stocker.

 

[arson]

wouldnt a filter on there either get blown off, or not let the air out fast enough and put more pressure on the turbo in the wrong direction?

 

[nine5raptor]

No, I have used a t-shirt for a filter on mine until I got my valve cover breather from Moroso. The 20 psi did not destroy nor blow off the filter (I did blow out the t-shirt once though)

 

[Generation1JeY]

they have the filters on some blitz bovs and others like it, theyre made for desert buggies and offroad stuff like that.

Bottom line if ur venting a 1g bov just recirc it. reason 1: stock 1g bov sounds like crap vented. reason 2: it leaks at idle which will of course give u the terrible side effects of venting like bogging and stalling and the pulsing idle.

If u want to vent get an aftermarket adjustable bov that sounds better and stays closed at idle.

 

[Mirage2LTurbo]

they have the filters on some blitz bovs and others like it, theyre made for desert buggies and offroad stuff like that.

Bottom line if ur venting a 1g bov just recirc it. reason 1: stock 1g bov sounds like crap vented. reason 2: it leaks at idle which will of course give u the terrible side effects of venting like bogging and stalling and the pulsing idle.

If u want to vent get an aftermarket adjustable bov that sounds better and stays closed at idle.

It is not a "leak" at idle!!! The reason your car runs like poo venting your BOV is because it is MASS AIR METERED, it has nothing to do with it opening at idle. a MAF metered car MUST HAVE THE RECIRC tube on to run as designed, it doesn't matter what BOV you have. If you convert to speed density, such as a standalone, then you no longer need to recirc the air.

 

[Turblown]

If you convert to speed density, such as a standalone, then you no longer need to recirc the air.

Right... this is when a filter can be used.... when using a GM MAF, Hks VPC, etc to control air/fuel after the BOV and before the TB. The fact that the BOV remains slightly open at idle has nothing to do with the car running like crap when you take off the re-circ tube.... but if you are PROPERLY venting to atmosphere, then I would suggest using a small air filter to prevent dirt from entering the system.

 

[sweet97]

Just put the damned recirculation tube back on it.

Jesus.

Jesus did create the laws of physics though I don't believe He is interested in the action of a stock BOV though there is nothing wrong with asking the Father for assistance with difficulties with an individual's car if that person is His disciple. Personally I pray about situations with my car often leaving it in the hands of my creator. He is interested in our daily lives no matter how boring or unfullfilling our lives may seem.
I ama disciple and daily prayer is part of my daily life. I must admit I do not read His word daily though I do try.
I agree, hook up the BOV so that it acts as the manufacturer designed it. Should anyone wish to discuss having a relationship with Christ please PM me as these forums are not the proper place to discuss God/man relationships. Thanks for opening the door Defiant, Mark

 

[Defiant]

Jesus Morales did all that?

And I thought he was just the fleet manager at one of the local trucking companies.

I am impressed.

 

[sweet97]

Jesus Morales did all that?

And I thought he was just the fleet manager at one of the local trucking companies.

I am impressed.

My mistake, when I saw damned and Jesus in the same reply I never thought of Morales. However I also thought he was named Jesus because his last name, Morales meant morals, which turned me to Jesus Christ!
Another mistake I made was concerning the allowance or lack of such having to do with swearing here at tuners. Me bad! Too many assumptions and you know what that brings! It makes an a$$ of you and me. Apologies and out. Mark

 

[Mirage2LTurbo]

Right... this is when a filter can be used.... when using a GM MAF, Hks VPC, etc to control air/fuel after the BOV and before the TB. The fact that the BOV remains slightly open at idle has nothing to do with the car running like crap when you take off the re-circ tube.... but if you are PROPERLY venting to atmosphere, then I would suggest using a small air filter to prevent dirt from entering the system.

Properly venting to atmosphere? There is no proper way to do it, you either vent it or you dont. There is NO reasont to run an air filter on your BOV. I don't even run a filter on my turbo, let alone on anything else.. A piece of screen folded over a couple times is all you need. There is no performance reason to vent it on a MAF metered car, it only hurts. Speed density, you might as well vent it, there is no reason to recirc it. This is a black and white situation.

 

[Generation1JeY]

It is not a "leak" at idle!!! The reason your car runs like poo venting your BOV is because it is MASS AIR METERED, it has nothing to do with it opening at idle. a MAF metered car MUST HAVE THE RECIRC tube on to run as designed, it doesn't matter what BOV you have.QUOTE]

Ok let me just say thats completely wrong. If u were correct in saying that whatever bov u have makes zero difference to my car running like "poo" then tell me why my car idles fine with a stiff turboxs rfl bov *closed at idle* as opposed to making my car bog and stall and sputter and have a pulsing idle while venting my 1g bov *open at idle*.

What u just said makes zero sense just because at idle if my bov wasnt open like u just said it wasnt, then why would its idle be messed up? the bov isnt open hence zero air is leaving the system so why would it have such ill performance?

The only con u cannot fix with venting a bov with a stock sensor is the rich shifting, all the other downsides are easily fixed by just modifying the stock 1g bov if u want to vent that, or buy buying an aftermarket adjustable bov.

Please dont respond with anymore nonsense about the MAS because i get a headache arguing about leaky bovs and ill effects of venting. The point here is ur wrong in all ur assumptions about bad idle when it comes to a vented blow off valve, and i have tested my car far too many times to be told that the problem with its idle is "MASS AIR METERED"

 

[Mirage2LTurbo]

Ok let me just say thats completely wrong. If u were correct in saying that whatever bov u have makes zero difference to my car running like "poo" then tell me why my car idles fine with a stiff turboxs rfl bov *closed at idle* as opposed to making my car bog and stall and sputter and have a pulsing idle while venting my 1g bov *open at idle*.

You just reinforced my point of if you have a MAF metered car with a vented BOV, it will sputter and die at idle.

What u just said makes zero sense just because at idle if my bov wasnt open like u just said it wasnt, then why would its idle be messed up? the bov isnt open hence zero air is leaving the system so why would it have such ill performance?

Idle is controlled by many other things.. could be a vacuum leak, need to adjust the idle screw, or maybe a bad/wired wrong idle air control valve. Have you run a pressure test? Are you sure no air is leaving your "system?"

The only con u cannot fix with venting a bov with a stock sensor is the rich shifting, all the other downsides are easily fixed by just modifying the stock 1g bov if u want to vent that, or buy buying an aftermarket adjustable bov.

Please dont respond with anymore nonsense about the MAS because i get a headache arguing about leaky bovs and ill effects of venting. The point here is ur wrong in all ur assumptions about bad idle when it comes to a vented blow off valve, and i have tested my car far too many times to be told that the problem with its idle is "MASS AIR METERED"

If you vent the air on a MAF metered car, it will run rich inbetween shifts, it doesn't matter what BOV you have, the ECU still sees 11x air coming in, so it throws in 1x fuel, then you vent off some of that air so now you have 8x air and 1x fuel because the ECU thinks the air is getting recirc'd on a MAF metered car.

What is this "stock sensor" you speak of? I think you're the one that needs to stop replying. I too idled my 4g63 Mirage just fine on a good sized turbo venting the BOV with only an SAFC, but that doesn't mean it works for everyone. I've seen some that for whatever reason, maybe bad leak-down or who knows what, will not run worth shit with a vented BOV. My first DSM was one of them..

The fact remains, if you vent your BOV on a MAF metered car, it is going to do nothing but possibly cause tuning/idle/dying issues. FACT.

 

[Generation1JeY]

who do u think ur talking to? i know what ill effects a vented bov cause so stop trying to preach to me about metered air leaving the system i'm already aware of that.

I'm not talking about anything other than the car idling. In ur first post u said that the bov leaking at idle has no effect on the terrible idle. That right there is completely wrong. And i back that up by saying when u have a bov that doesnt leak at idle u get no bad idle problems. Hence it must be the leaky bov causing the bad idle.

we have some miscommunication here

 

[Mirage2LTurbo]

who do u think ur talking to? i know what ill effects a vented bov cause so stop trying to preach to me about metered air leaving the system i'm already aware of that.

I'm not talking about anything other than the car idling. In ur first post u said that the bov leaking at idle has no effect on the terrible idle. That right there is completely wrong. And i back that up by saying when u have a bov that doesnt leak at idle u get no bad idle problems. Hence it must be the leaky bov causing the bad idle.

we have some miscommunication here

Never once did I use the blanket statement "an open BOV at idle kills your idle." You need to re-read my posts. If I was talking about my BOV opening at idle, it's because I'm on a speed density setup, and it DOESN'T affect me to vent my BOV. If you are talking about any other time I was talking about it affecting idle, I specifically said "If you are MAF metered, you need to recirc your BOV."

You are talking yourself in circles, as your previous post contradicts what you said here.

 

[Generation1JeY]

i'm talking about ur first post where u said its not a leak at idle. It is a leak at idle, thats why u have crappy idle with a leaky vented bov and a steady idle with a non-leaking bov. Thats why the idle is so screwed up cause ur vacuum is messed up from the air leaving the system.

 

[Mirage2LTurbo]

i'm talking about ur first post where u said its not a leak at idle. It is a leak at idle, thats why u have crappy idle with a leaky vented bov and a steady idle with a non-leaking bov. Thats why the idle is so screwed up cause ur vacuum is messed up from the air leaving the system.

First post

You put filters on your BOV's?

Yes, my BOV opens at idle too

Second post

It's not a leak at idle, my damn Tial 50 opens at idle. You don't need an air filter on your BOV, that's retarded. Put your recirc line on unless you're on a speed density setup.

It isn't a leak. It is DESIGNED to open at idle. All BOV's do it. Mine is vented and I idle fine. Why? Because I'm not on a MAF metered setup, I'm using speed density. The guy that made this thread idle like ass. Why? Because he's on a MAF setup. If you put the recirc tube on when you run a MAF setup like it's DESIGNED to work, it WILL IDLE FINE (given you don't have any other issues).