Question: Is synapse bov suppose to suck in air during idle?

HPF_E92 · 04-25-2011, 01:34 PM

I have recently installed a synapse bov with charge pipe on my 335i along with Procede V5. Out of curiosity I have used a thin sheet of paper to test the bov air flow lately and realized that the bov is actually sucking in air during idle.

For all the experts out there, is this normal or did I install my bov wrong? won't it be sucking in unfiltered air in that case?

Any input will be appreciated!

Iwantm3 · 04-25-2011, 01:43 PM

sucking air ? That's weird are you sure ?

bimmertt · 04-25-2011, 01:47 PM

That is unusual. On the N54 it is supposed to be blowing out air...even under some load.

HPF_E92 · 04-25-2011, 01:52 PM

Yes, I am pretty sure it is sucking in air ... aside from that the bov is functioning fine though.

domrep · 04-25-2011, 01:53 PM

Quote:

Originally Posted by HPF_E92

I have recently installed a synapse bov with charge pipe on my 335i along with Procede V5. Out of curiosity I have used a thin sheet of paper to test the bov air flow lately and realized that the bov is actually sucking in air during idle.

For all the experts out there, is this normal or did I install my bov wrong? won't it be sucking in unfiltered air in that case?

Any input will be appreciated!

You definitely installed it wrong. It is always suppose to blow out hence no need for an anti-stall kit to install in it. I wouldnt be driving your car like that for now. Do you have a DCI? Make sure you're connecting it to your intake manifold vacuum line and none of the recirculating lines.

Proper Motion LLC · 04-25-2011, 01:59 PM

it's vents air out at idle, there are video demonstrations by Synapse on YouTube

HPF_E92 · 04-25-2011, 02:01 PM

I have basically follow the instruction and split the Y tube into the two inlet on the bov; while connecting the other end to where the original diverter connects to (somewhere beside the inner intake piping).

Does that sound about right? My bov blow off fine under load though.

PeteW84 · 04-25-2011, 02:15 PM

domrep · 04-25-2011, 02:28 PM

Quote:

Originally Posted by HPF_E92

I have basically follow the instruction and split the Y tube into the two inlet on the bov; while connecting the other end to where the original diverter connects to (somewhere beside the inner intake piping).

Does that sound about right? My bov blow off fine under load though.

No. There should be a line coming out of your intake manifold, that's the one you use.

HPF_E92 · 04-25-2011, 03:51 PM

There should be only one output from the engine which I assume is below the intake manifold.

HPF_E92 · 04-25-2011, 04:42 PM

After read this, I think I have a clue on what I screwed up..... and I've been driving it this way for 2 months....
http://www.e90post.com/forums/showthread.php?t=66252

domrep · 04-25-2011, 05:00 PM

I hope your BOV didnt suck anything in. Was your BOV even making any noise/working?? Remove your stock DV piping as well

maybe take a good pic of your engine bay/bov area and we can help you further.

HPF_E92 · 04-25-2011, 06:59 PM

Just got home and check it out again, what I realize is that the below findings:

Stock Map (Procede V5)
- When I first started the car, the bov is blowing air out.
- After a 30 secs of idling, the bov started to suck air in.

Map 1 (Procede V5)
- The bov is always blowing air.

And I have reassure that all connections are good. I think it might have something to do with the Procede instead then.

domrep · 04-25-2011, 07:45 PM

That looks right to me....how is the sound on it? When i connected mine wrong the very first time there was no sound

Bakeme521 · 04-25-2011, 07:51 PM

Mine blows out when idling.

HPF_E92 · 04-26-2011, 06:30 AM

It sounds perfectly normal ..

domrep · 04-26-2011, 07:31 AM

so nothings wrong then lol

HPF_E92 · 04-26-2011, 07:42 AM

The fact that it is sucking air while idling is weird. Cause even if I have a leak, it should not be sucking in air.

MF80 · 05-30-2011, 11:06 PM

Alright, I just installed mine and it's doing the same exact thing here...sucking air in during idle. I have ER chargepipe with Synapse BOV. Please help?

Thanks,
J-

MF80 · 05-30-2011, 11:31 PM

Quote:

Originally Posted by JsTech

Alright, I just installed mine and it's doing the same exact thing here...sucking air in during idle. I have ER chargepipe with Synapse BOV. Please help?

Thanks,
J-

Did couple wot runs, check bov again and found it now blows air out. And it stays just like that...

So, wtf is going on? I don't know but I'm happy now...

PeteW84 · 05-30-2011, 11:41 PM

Quote:

Originally Posted by JsTech

Did couple wot runs, check bov again and found it now blows air out. And it stays just like that...

So, wtf is going on? I don't know but I'm happy now...

As long as it works properly now, don't worry about it.

ian2002525 · 06-01-2011, 12:48 AM

if dont feel comfortable with the situation, just take it off and change to another bov.

04-25-2011, 01:34 PM	#1
HPF_E92 Private First Class 12 Rep 175 Posts Drives: E92 Join Date: Aug 2010 Location: GTA iTrader: (2)	Question: Is synapse bov suppose to suck in air during idle? I have recently installed a synapse bov with charge pipe on my 335i along with Procede V5. Out of curiosity I have used a thin sheet of paper to test the bov air flow lately and realized that the bov is actually sucking in air during idle. For all the experts out there, is this normal or did I install my bov wrong? won't it be sucking in unfiltered air in that case? Any input will be appreciated!
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04-25-2011, 01:43 PM	#2
Iwantm3 Banned 38 Rep 1,284 Posts Drives: 335i M sport Join Date: Mar 2009 Location: US AND A I likeeeee iTrader: (1)	sucking air ? That's weird are you sure ?
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04-25-2011, 01:47 PM	#3
bimmertt Lieutenant Colonel 98 Rep 1,799 Posts Drives: 2007 e92 335i Join Date: Nov 2008 Location: Earth iTrader: (7)	That is unusual. On the N54 it is supposed to be blowing out air...even under some load.
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04-25-2011, 01:52 PM	#4
HPF_E92 Private First Class 12 Rep 175 Posts Drives: E92 Join Date: Aug 2010 Location: GTA iTrader: (2)	Yes, I am pretty sure it is sucking in air ... aside from that the bov is functioning fine though.
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04-25-2011, 01:59 PM	#6
Proper Motion LLC Custom Powder Coater 149 Rep 2,784 Posts Drives: White 335i Sedan Join Date: Dec 2008 Location: Orange County CA iTrader: (2)	it's vents air out at idle, there are video demonstrations by Synapse on YouTube __________________ www.propermotion714.com
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04-25-2011, 02:01 PM	#7
HPF_E92 Private First Class 12 Rep 175 Posts Drives: E92 Join Date: Aug 2010 Location: GTA iTrader: (2)	I have basically follow the instruction and split the Y tube into the two inlet on the bov; while connecting the other end to where the original diverter connects to (somewhere beside the inner intake piping). Does that sound about right? My bov blow off fine under load though.
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04-25-2011, 02:15 PM	#8
PeteW84 COBB'ed 65 Rep 2,228 Posts Drives: 13 Mini Cooper S Join Date: Apr 2008 Location: Tinley Park, IL iTrader: (1) Garage List 2008 335i [7.56]	__________________ 13 Mini Cooper S 08 E92 335i (SOLD)
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04-25-2011, 03:51 PM	#10
HPF_E92 Private First Class 12 Rep 175 Posts Drives: E92 Join Date: Aug 2010 Location: GTA iTrader: (2)	There should be only one output from the engine which I assume is below the intake manifold.
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04-25-2011, 04:42 PM	#11
HPF_E92 Private First Class 12 Rep 175 Posts Drives: E92 Join Date: Aug 2010 Location: GTA iTrader: (2)	After read this, I think I have a clue on what I screwed up..... and I've been driving it this way for 2 months.... http://www.e90post.com/forums/showthread.php?t=66252
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04-25-2011, 05:00 PM	#12
domrep Captain 43 Rep 993 Posts Drives: AW E93 335i Join Date: Mar 2009 Location: Toronto iTrader: (3)	I hope your BOV didnt suck anything in. Was your BOV even making any noise/working?? Remove your stock DV piping as well maybe take a good pic of your engine bay/bov area and we can help you further. Last edited by domrep; 04-25-2011 at 05:16 PM..
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04-25-2011, 06:59 PM	#13
HPF_E92 Private First Class 12 Rep 175 Posts Drives: E92 Join Date: Aug 2010 Location: GTA iTrader: (2)	Just got home and check it out again, what I realize is that the below findings: Stock Map (Procede V5) - When I first started the car, the bov is blowing air out. - After a 30 secs of idling, the bov started to suck air in. Map 1 (Procede V5) - The bov is always blowing air. And I have reassure that all connections are good. I think it might have something to do with the Procede instead then. Attached Images
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04-25-2011, 07:45 PM	#14
domrep Captain 43 Rep 993 Posts Drives: AW E93 335i Join Date: Mar 2009 Location: Toronto iTrader: (3)	That looks right to me....how is the sound on it? When i connected mine wrong the very first time there was no sound
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04-25-2011, 07:51 PM	#15
Bakeme521 Some say... 251 Rep 4,296 Posts Drives: Fresh Join Date: Mar 2010 Location: Baton Rouge n NOLA iTrader: (12) Garage List 2007 BMW 335i [8.24]	Mine blows out when idling. __________________ I have exhaust and an intake...
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04-26-2011, 06:30 AM	#16
HPF_E92 Private First Class 12 Rep 175 Posts Drives: E92 Join Date: Aug 2010 Location: GTA iTrader: (2)	It sounds perfectly normal .. Last edited by HPF_E92; 04-26-2011 at 07:09 AM..
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04-26-2011, 07:31 AM	#17
domrep Captain 43 Rep 993 Posts Drives: AW E93 335i Join Date: Mar 2009 Location: Toronto iTrader: (3)	so nothings wrong then lol
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04-26-2011, 07:42 AM	#18
HPF_E92 Private First Class 12 Rep 175 Posts Drives: E92 Join Date: Aug 2010 Location: GTA iTrader: (2)	The fact that it is sucking air while idling is weird. Cause even if I have a leak, it should not be sucking in air.
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05-30-2011, 11:06 PM	#19
MF80 Captain 45 Rep 809 Posts Drives: AW 2008 E92 335i Join Date: Dec 2009 Location: Area51 iTrader: (10)	Alright, I just installed mine and it's doing the same exact thing here...sucking air in during idle. I have ER chargepipe with Synapse BOV. Please help? Thanks, J-
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06-01-2011, 12:48 AM	#22
ian2002525 台灣台北市 89 Rep 1,267 Posts Drives: 2009 GT-R Premium Join Date: Jun 2010 Location: Brentwood, TN/台灣 iTrader: (6) Garage List 2011 335i coupe [9.00]	if dont feel comfortable with the situation, just take it off and change to another bov. __________________ Car Sold- 2011 E92 335i Msport Car Sold- 2009 Nissan GT-R tuned on E85
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