You guys unplug your exhaust solenoid?

NoQuarter · 06-16-2011, 03:55 PM

Quote:

Originally Posted by teachdocs

Apparently the setup in a 2008 535Xi is different. Can anyone confirm in other series that also utilize the N54 setup?

535Xi: the exhaust flap solenoid is in a normally closed position. Applying vacuum causes the flap to open. If you disconnect the solenoid wire, you are putting the flap permanently closed, not open.
The only way to correct this is to bypass the vacuum valve in the left rear quarter panel of the trunk. (Disconnect the solenoid harness if you have a Procede for diagnostic invisibility purposes). Use a connector to hook the engine vacuum hose directly to the exhaust solenoid vacuum line (bypass the valve). Now the valve is always open when the engine is running. This also happens to be the way the exhaust valves work on a 2010 760Li.

This is completely backwards of what has been described in the 335 setup. The exhaust flap is apparently normally in an open position and closes when vacuum is applied. By disconnecting the harness to the solenoid or plugging the vacuum line at the solenoid (golf T mod or BB in the tubing), you remove all vacuum to the valve and it stays open.

Can anyone else confirm the difference on other X35 series?
Any ideas on why BMW would do this different on one series to another?

If so, will need to update the Procede user manual to reflect these differences.

Thanks

You are correct - the 535 is backwards than all the 335 related exhaust flap posts. You don't need any extra connectors. Disconnecting the hose out of the solenoid (the exhaust valve side) and the one going into it where the hardline meets the rubber hose gives a place to bypass the solenoid without any adapters or extra pieces.

CosmosMpower · 06-16-2011, 07:31 PM

I opened mine through the jb4 can't tell a big difference

VWtoBMW · 06-17-2011, 10:17 AM

Unplugged mine yesterday. Sounds nice!

Ben N · 03-19-2013, 08:39 PM

Quote:

Originally Posted by chappy

Yes have a look just at the rear muffler and you will see a hose going to the exhaust flap pull the hose out and put a slightly larger ball bearing in the hose or something else and reconnect hose to the flap, no need to disconnect the electrical plug, simple and a very nice deeper exhaust note.

I've tried to unplug it and it's really giving me trouble... I don't want to pull to hard for fear of breaking something-- was it very difficult for you to unplug the hose?

marcvtec · 03-20-2013, 04:25 PM

I hate the drone personally, even though it is minor

TrentOSU · 07-06-2013, 02:31 PM

Does bending the hose and zip tying it end in the same results?

135Hoser · 07-06-2013, 02:40 PM

Quote:

Originally Posted by TrentOSU

Does bending the hose and zip tying it end in the same results?

Why not just disconnect the wiring hiding in the trunk?

You need to completely block the vaccum on that line.

E90Company · 07-06-2013, 02:42 PM

Quote:

Originally Posted by TrentOSU

Does bending the hose and zip tying it end in the same results?

Yes.

TrentOSU · 07-06-2013, 03:01 PM

Quote:

Originally Posted by 135Hoser

Why not just disconnect the wiring hiding in the trunk?

You need to completely block the vaccum on that line.

I am worried about codes...I don't have the stuff to clear them. It's still under the manufacture warranty and is a CPO.

E90Company · 07-06-2013, 03:08 PM

Quote:

Originally Posted by TrentOSU

I am worried about codes...I don't have the stuff to clear them. It's still under the manufacture warranty and is a CPO.

They don't care about that code. Means nothing to them. The dealer usually unplugs the cable anyway to stop rattling.

TrentOSU · 07-06-2013, 04:14 PM

Quote:

Originally Posted by E90Company

They don't care about that code. Means nothing to them. The dealer usually unplugs the cable anyway to stop rattling.

Where is it exactly?

E90Company · 07-06-2013, 04:16 PM

Quote:

Originally Posted by TrentOSU

Where is it exactly?

The connector is in the trunk behind the drivers side tail light. Take off the panel and you will see it. Here is a link to the plug: http://www.e90post.com/forums/showthread.php?t=80661

TrentOSU · 07-06-2013, 04:40 PM

Quote:

Originally Posted by E90Company

The connector is in the trunk behind the drivers side tail light. Take off the panel and you will see it. Here is a link to the plug: http://www.e90post.com/forums/showthread.php?t=80661

Just did it...it makes quite the increase when it comes to the throaty noise.

E90Company · 07-06-2013, 04:48 PM

Quote:

Originally Posted by TrentOSU

Just did it...it makes quite the increase when it comes to the throaty noise.

Sure does

07-06-2013, 04:56 PM

Someone needs to come up with a harness that plugs in between the stock connectors and has a switch attached to it. I work in the city and don't mind the extra sound for short drives; more than 15 minutes on the highway can get annoying though. Instead of plugging/unplugging all the time, a rocker switch poking out of the small removable carpeted trunk panel would be great!

I'd do it myself, but I don't want to cut into the factory wiring. Anyone know where to find connectors that will work with the stock pieces?

secretsquirrel · 07-06-2013, 05:20 PM

Drone? You guys have sissy ears.

Infinitis have louder exhaust, stock.

jeeve.x · 07-06-2013, 05:32 PM

I feel it's just a tad louder than stock on cold starts. Once everything is warmed up it's just like driving around in DS mode for ATs.

06-16-2011, 07:31 PM	#46
CosmosMpower Brigadier General 2063 Rep 3,721 Posts Drives: F87c, GT3, MK7 GTI Join Date: Apr 2011 Location: Frisco, TX iTrader: (1)	I opened mine through the jb4 can't tell a big difference
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06-17-2011, 10:17 AM	#47
VWtoBMW Captain 71 Rep 898 Posts Drives: 2021 X5 Join Date: Aug 2009 Location: Toronto iTrader: (5) Garage List 2013 750i xDrive [0.00] 2015 Mercedes GLK350 [0.00]	Unplugged mine yesterday. Sounds nice! __________________ 2018 540d xDrive Carbon Black Metallic on Cognac leather. Spec'd out to the max 2017 Mercedes C43 AMG Coupe. Black on black
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03-20-2013, 04:25 PM	#49
marcvtec Banned 411 Rep 2,703 Posts Drives: M5 Join Date: Oct 2006 Location: toronto iTrader: (0)	I hate the drone personally, even though it is minor
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07-06-2013, 02:31 PM	#50
TrentOSU Lieutenant 22 Rep 592 Posts Drives: 11' AW e90 335i M-Sport Join Date: Aug 2012 Location: Corvallis, Oregon iTrader: (1)	Does bending the hose and zip tying it end in the same results?
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07-06-2013, 04:56 PM	#59
FCobra94 Guest 0 Rep n/a Posts Drives:	Someone needs to come up with a harness that plugs in between the stock connectors and has a switch attached to it. I work in the city and don't mind the extra sound for short drives; more than 15 minutes on the highway can get annoying though. Instead of plugging/unplugging all the time, a rocker switch poking out of the small removable carpeted trunk panel would be great! I'd do it myself, but I don't want to cut into the factory wiring. Anyone know where to find connectors that will work with the stock pieces?
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07-06-2013, 05:20 PM	#60
secretsquirrel Colonel 193 Rep 2,341 Posts Drives: f80 Join Date: Dec 2010 Location: Far North Dallas iTrader: (2)	Drone? You guys have sissy ears. Infinitis have louder exhaust, stock.
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07-06-2013, 05:32 PM	#61
jeeve.x Lieutenant 20 Rep 425 Posts Drives: E90 335i Join Date: Sep 2012 Location: San Diego iTrader: (1)	I feel it's just a tad louder than stock on cold starts. Once everything is warmed up it's just like driving around in DS mode for ATs.
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