bov question

[jcorn517]

How much air is supposed to come out of the bov at idle? I think I might have a bad stock 1g bov I get a lot of air out of mine and it causes a rough idle

 

[DRTredHEAD]

Ideally 0.

 

[pauleyman]

How do you guys think a BOV works? A bov is open at idle. This is why you can't leave it open. THis is how a BOV works. Under vacuum it's open. That's why it lets off boost when you shift. Pressure is on the bottom of the valve, vacuum on the top. Even at just vacuum on the top, it's open. Upon transition in use it opens more quickly giving the traditional "psshhh" sound. It's normal.

 

[schmitty1991]

Are you having it recirculated into the intake? Or is it open atmosphere

 

[jcorn517]

It's recirculating. Here's my symptoms if I take off the recirc tube and plug the bov the idle gets better. Or if I drive down the expressway for 10 miles the rough idle goes away. And it feels like I don't have the normal power at wot

 

[pauleyman]

The idle should be good no matter what if its recirculated uness the diaphagm is bad if the diaphragm is bad air gets past the throttle body at idle via the bov intake source. Pull the valve and plug the flange with your hand see if it idles. Pull a vac on the bov and see if it opens. If it doesnt its bad.

 

[PrimerPLus]

Did you do a BLT?
Have you replaced your o2 sensor ever?

WHen you take off the recurculation tube do you plug the whole on the intake or leave open, and when you say you plug the bov, what are you plugging it with? are you driving it while its plugged?

Maybe this can help you check some things off. Terry's Talon Troubleshooting Tips #3 - Fast Idle (aka. Idle Surge)

 

[jcorn517]

Plugging it when its idling with the palm of my hand to stop the air from coming out and it goes back to idling perfect right away

And like I said earlier it seems like its lost a little bit of power too for some reason....that's why I'm thinking bov but def open to suggestions

 

[pauleyman]

already gave you everything you need