BOV leaks during vacuum idling,is this normal?

[jakes97gs]

Hey guys, I have a ebay type rs bov and i was trying to make sure its adjusted right as it was set very soft, as i was adjusting i decided to let the car idle and make sure the valve is closed during vacuum as i read it should be, but when i popped off my recirculation hose i noticed that the valve is blowing out air that i could feel on my hand. during regular idle in vacuum it was blowing air, if i adjusted the valve softer it got a little worse but if I hardened the setting even all the way it still blew air at idle. is this normal or should i be getting a new bov? i have it set somewhere in the middle right now for driving and it doesn't seem to act strange, but its most likely been like this the entire time i've owned the car and with the mods i have my car has always ran a little funny. Thanks in advance for any help

 

[crash89]

Where you or the previous owner went wrong was buying aftermarket performance parts off ebay... The only thing you "should" get off there is exhaust simply because its just a pipe..

However, you should be getting a new one.. A stock 1g unit is a quality part and could probably be had from a junk yard or craiglslist for cheap. Check out some venders and buy a quality part..

 

[jakes97gs]

thanks for the advice, previous owner was at fault for buying the ebay bov but i suppose im just as bad for not replacing it , but to be clear my blow off valve is shot and it should not be blowing air at vacuum? thanks

 

[crash89]

Correct.. You have a dedicated vacuum source from the intake manifold to the BOV right? If there isnt that line or its incorrectly ran the BOV could work improperly by not having ample vacuum pulling the valve closed during idle and cruise..

 

[jakes97gs]

alrite, i will start searching for a new one, thanks

 

[Kyle_T]

I thought it was normal for some bov's to leak a little at idle. Thats why its important to recirculate. I know for a fact the synapse bov opens at idle.

 

[Spoolin92GSX]

It wouldn't hurt to pull it off and see if there's anything obstructing the seal or making the valve not move properly before you replace it. When I pulled my Type S to do the single spring mod I was surprised how dirty it was.

 

[LiquidX]

I thought it was normal for some bov's to leak a little at idle. Thats why its important to recirculate. I know for a fact the synapse bov opens at idle.

The bypass valve should not be open at idle.