synapse bov issues

Edis335i · 11-21-2013, 07:22 AM

I need advice/help with my synapse bov kit.
not sure if something is wrong here?
it is not blowing air at idle?
it isnt sucking air though either?
what could be the problem here?

brecken · 11-21-2013, 10:00 AM

You might want to state some symptoms. Why do you think there is something wrong with it?

csu87 · 11-21-2013, 10:03 AM

it wont blow air at idle. The only time it "blows" air is when you let off the throttle after boosting. It will release the boost pressure.

and someone correct me if im wrong, but i dont believe it should be sucking air either

BoostedE90 · 11-21-2013, 10:26 AM

It should definitely not be sucking air in. It should either be blowing air out or closed.

More than likely its an install error. Can you describe how the BOV is hooked up. Or better yet get a pic?
Is the car having any other issues? Codes?

Another thought is that one of your vacuum lines may have a small crack in it. Which would explain why at idle it's not blowing at air cause it's not getting a strong enough vacuum signal to open. But the fact that it's sucking in air is head scratcher.

csu87 · 11-21-2013, 12:52 PM

At idle your engine is in vacuum so it won't blow any air out.

boris · 11-21-2013, 12:57 PM

What the...

please post a pic of it installed.

b1aze · 11-21-2013, 01:12 PM

False!! Your BOV will be venting at idle, so it should be open and blowing some air out at idle. If it wasn't venting, you would have positive pressure at your TB, which is not normal.

135Pats · 11-21-2013, 01:21 PM

Synapse vents at idle, you should be able to feel a very slight stream of air being expelled.

Edis335i · 11-21-2013, 08:08 PM

i dont think its venting at idle.
i might have to check it again later when i get the time.
thanks guys!

Transport3r · 11-22-2013, 06:52 AM

Quote:

Originally Posted by Edis335i

i dont think its venting at idle.
i might have to check it again later when i get the time.
thanks guys!

The venting is so very very slight when the car is warmed up it's really hard to notice. If you're paranoid like me, you can put one of these over the exhaust flange of the BOV: K&N RU-0060

Good luck!

Edis335i · 11-22-2013, 11:23 PM

ok thanks for the input everyone!

11-21-2013, 07:22 AM	#1
Edis335i New Member 0 Rep 15 Posts Drives: 335i e92 atlantic blue Join Date: Apr 2013 Location: fargo,ND iTrader: (0)	synapse bov issues I need advice/help with my synapse bov kit. not sure if something is wrong here? it is not blowing air at idle? it isnt sucking air though either? what could be the problem here? __________________ Mods: Jb4,catback,dci,ac shnizter wheels
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11-21-2013, 10:00 AM	#2
brecken First Lieutenant 24 Rep 372 Posts Drives: 335i Join Date: May 2013 Location: Tampa and Melbourne iTrader: (0)	You might want to state some symptoms. Why do you think there is something wrong with it? __________________ Thought I joined a car forum but all we ever talk about is alcohol, meth, and LSD
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11-21-2013, 10:03 AM	#3
csu87 Banned 2130 Rep 3,553 Posts Drives: 09 335xi Join Date: Nov 2013 Location: Northern Colorado iTrader: (0)	it wont blow air at idle. The only time it "blows" air is when you let off the throttle after boosting. It will release the boost pressure. and someone correct me if im wrong, but i dont believe it should be sucking air either
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11-21-2013, 10:26 AM	#4
BoostedE90 Lieutenant Colonel 60 Rep 1,690 Posts Drives: e90 335i 6MT Join Date: Nov 2007 Location: Tampa/Gainesville, FL iTrader: (5)	It should definitely not be sucking air in. It should either be blowing air out or closed. More than likely its an install error. Can you describe how the BOV is hooked up. Or better yet get a pic? Is the car having any other issues? Codes? Another thought is that one of your vacuum lines may have a small crack in it. Which would explain why at idle it's not blowing at air cause it's not getting a strong enough vacuum signal to open. But the fact that it's sucking in air is head scratcher. Last edited by BoostedE90; 11-21-2013 at 10:52 AM..
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11-21-2013, 12:52 PM	#5
csu87 Banned 2130 Rep 3,553 Posts Drives: 09 335xi Join Date: Nov 2013 Location: Northern Colorado iTrader: (0)	At idle your engine is in vacuum so it won't blow any air out.
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11-21-2013, 12:57 PM	#6
boris Борис 31 Rep 505 Posts Drives: e92 n54 335i Join Date: Nov 2012 Location: CT iTrader: (1)	What the... please post a pic of it installed. __________________ 07 SG 335i GONE! COBB - Burger Motorsports -Ultimate Racing - Evolution Racewerks - TiAL- AMS In Winter Mode - Dunlop Wintersport 3D/Sport Edition Wheels
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11-21-2013, 01:12 PM	#7
b1aze Just one more taste... 567 Rep 2,011 Posts Drives: 2013 128i 6MT MSport Join Date: Aug 2012 Location: Uxbridge MA iTrader: (18)	False!! Your BOV will be venting at idle, so it should be open and blowing some air out at idle. If it wasn't venting, you would have positive pressure at your TB, which is not normal. __________________ My Build Thread: Jet Black 6MT 128i with MSport
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11-21-2013, 01:21 PM	#8
135Pats Major General 461 Rep 6,478 Posts Drives: A few BMWs Join Date: May 2012 Location: Maryland iTrader: (3)	Synapse vents at idle, you should be able to feel a very slight stream of air being expelled. __________________ E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP F30 N55 XDrive EBII
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11-21-2013, 08:08 PM	#9
Edis335i New Member 0 Rep 15 Posts Drives: 335i e92 atlantic blue Join Date: Apr 2013 Location: fargo,ND iTrader: (0)	i dont think its venting at idle. i might have to check it again later when i get the time. thanks guys! __________________ Mods: Jb4,catback,dci,ac shnizter wheels
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11-22-2013, 11:23 PM	#11
Edis335i New Member 0 Rep 15 Posts Drives: 335i e92 atlantic blue Join Date: Apr 2013 Location: fargo,ND iTrader: (0)	ok thanks for the input everyone! __________________ Mods: Jb4,catback,dci,ac shnizter wheels
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