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BMW 3-Series (E90 E92) Forum
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Butterfly valve on exhaust?
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11-26-2006, 09:11 AM | #1 |
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Butterfly valve on exhaust?
This morning I was being curious as usual and found a vacuum actuated valve on the driver's side exhaust just after the muffler. Any idea when this is closed or what effect it has on the engine?
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- 1998 E36M3/4 (retired)
- 2005 E46 330i ZHP (totaled) - 2007 E90 335i Black/Blk/Alu Trim (retired) - 2009 E90 M3 - Jet Blk on Blk mDCT - 1987 E30 325is - track car conversion in progress |
11-26-2006, 09:40 AM | #2 |
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try this thread.http://www.e90post.com/forums/showthread.php?t=33715
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11-26-2006, 09:53 AM | #4 |
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FYI, I know there has been some discussion and debate about the true function of this valve. I recently discovered that the E90 electrical system may have a backpressure sensor as well.
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11-26-2006, 10:02 AM | #5 | |
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Great information. I have worked on a few E90's in our shop and have not come across any type of sensor. Do you know any links regarding this information? -Nate
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11-26-2006, 10:04 AM | #6 |
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Thanks.....I may clamp the hose one day to see if there is a sound difference but if there is no performance benefits, I'll just leave it stock.
BTW, I did do a couple of searches and nothing came up. I guess I used the wrong key words in my search.
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- 1998 E36M3/4 (retired)
- 2005 E46 330i ZHP (totaled) - 2007 E90 335i Black/Blk/Alu Trim (retired) - 2009 E90 M3 - Jet Blk on Blk mDCT - 1987 E30 325is - track car conversion in progress |
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11-26-2006, 10:15 AM | #7 | |
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11-26-2006, 10:30 AM | #9 |
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I bought the wiring diagrams for the E90. Also, bmwtechinfo.com via paid subscription.
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11-26-2006, 11:33 AM | #11 | |
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frogman, can you look up the wiring for the rear seat power outlets for European models? I want to install the rear outlets but without the wire taps everyone else used. I suspect the Euro models with rear seat outlets must have a pig-tail that splits the power to the hidden front armrest ("iPod") power outlet and to the rear outlets. I thought about running wire to the front cigarette lighter like FrankQ did when he swapped the sunglasses holder but I believe there is a cleaner, "factory" way to do this. My dealer has been 2 weeks trying to obtain this info but no luck so far. Could you help me out, please? I need diagrams and especially part numbers for the connectors, if possible, so I can make my own pig-tail. Thanks!
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Ordered: 4.3.2006 Scheduled for Production: 4.7.2006 Awaiting Transport: 4.13.2006 En Route: 4.19.2006 At Preparation Center: 5.11.2006 Performance Center Delivery: 06.01.2006 |
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11-26-2006, 11:35 AM | #12 | |
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11-26-2006, 12:48 PM | #13 | |
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I am off to change my oil at 2000miles... DYI, of course.
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330xi Sparkling Graphite | Terra with Burl Walnut | ZPP | ZSP with Style 162 | Comfort Access | Heated Seats | PDC | Navigation | Satellite Radio | OEM Alarm | De-badged | OEM Strut Brace | Blacklines | Rear Fogs | Silver Front Indicator Bulbs
Ordered: 4.3.2006 Scheduled for Production: 4.7.2006 Awaiting Transport: 4.13.2006 En Route: 4.19.2006 At Preparation Center: 5.11.2006 Performance Center Delivery: 06.01.2006 |
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11-26-2006, 06:35 PM | #14 | |
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I'm not sure this will help. This is the best I have: |
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11-26-2006, 07:17 PM | #15 |
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Froggy, that backpressure sensor looks like N54 only, i.e. TURBO! =)
Our N52's don't have one, I don't think. |
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11-26-2006, 07:34 PM | #17 | |
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Thanks for trying. I appreciate that you took the time to look for it. I need a little more detail of the power connection (bottom left hand side of the read console and the part numbers of the connectors. BTW, are you missing the SVG software from Adobe to view the diagrams? Get it here http://www.adobe.com/svg/viewer/install/ Adobe is discontinuing support for SVG on Jan 1, 2008. May I ask where you ordered the WDS disk from? PM me if you prefer to answer that way.
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330xi Sparkling Graphite | Terra with Burl Walnut | ZPP | ZSP with Style 162 | Comfort Access | Heated Seats | PDC | Navigation | Satellite Radio | OEM Alarm | De-badged | OEM Strut Brace | Blacklines | Rear Fogs | Silver Front Indicator Bulbs
Ordered: 4.3.2006 Scheduled for Production: 4.7.2006 Awaiting Transport: 4.13.2006 En Route: 4.19.2006 At Preparation Center: 5.11.2006 Performance Center Delivery: 06.01.2006 |
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11-26-2006, 07:50 PM | #18 | |
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11-28-2006, 01:34 PM | #19 |
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