Just installed VRSF Downpipes and now black smoke at WOT :(

M3_Dylan · 03-28-2012, 07:09 PM

I just installed my new downpipes and now when I WOT black smoke pours out. No smoke at idle or regular acceleration only at WOT. So my question is what did I screw up this time

Ernerd · 03-28-2012, 07:12 PM

I think that's normal. Either unburnt fuel or something else IIRC

skim7x · 03-28-2012, 07:16 PM

Quote:

Originally Posted by Ernerd

I think that's normal. Either unburnt fuel or something else IIRC

Um... don't think it's normal at all. Did You make sure all your connections are tight? There isn't really much you can mess up with a dp install besides that...

335okc · 03-28-2012, 07:21 PM

i got black smoke even with all the cats at wot. i think/hope its just because I'm running rich 12-12.5 at wot.

M3_Dylan · 03-28-2012, 07:21 PM

Quote:

Originally Posted by skim7x

Um... don't think it's normal at all. Did You make sure all your connections are tight? There isn't really much you can mess up with a dp install besides that...

Everything seems tight.... but it being loose would cause black smoke under WOT?

Brey335i · 03-28-2012, 07:24 PM

Less cats mean less filtration. I'd say you're burning oil.

Elliott@DetailAddict · 03-28-2012, 07:27 PM

Oil would be a blueish smoke. Black is a rich mixture of fuel.

M3_Dylan · 03-28-2012, 07:36 PM

I also forgot to mention I have had two misfires while WOT with this current set of spark plugs I have in...... I just haven't got around to replacing them think this could be part of the issue?

need4doors · 03-28-2012, 07:44 PM

Quote:

Originally Posted by spoiledxjoker

I also forgot to mention I have had two misfires while WOT with this current set of spark plugs I have in...... I just haven't got around to replacing them think this could be part of the issue?

Yes. Black smoke is usually unburned fuel. No spark/misfire = unburned fuel in the exhaust.

M3_Dylan · 03-28-2012, 07:48 PM

Quote:

Originally Posted by need4doors

Yes. Black smoke is usually unburned fuel. No spark/misfire = unburned fuel in the exhaust.

Even though, I didn't misfire during the runs with smoke?

Beemw335 · 03-28-2012, 08:32 PM

What tune are you running.
Log afrs

M3_Dylan · 03-28-2012, 09:52 PM

Quote:

Originally Posted by Beemw335

What tune are you running.
Log afrs

Procede V5 Rev 2.5..... time to learn how to do that lol

dfv2 · 03-28-2012, 09:57 PM

Black is fuel, blue is oil, rainbow is skittles. In other words you're running rich, check your AFR and fuel trims.

M3_Dylan · 03-28-2012, 10:11 PM

Quote:

Originally Posted by dfv2

Black is fuel, blue is oil, rainbow is skittles. In other words you're running rich, check your AFR and fuel trims.

Thanks im going to give that a shot tomorrow

Tiago@VRSF · 03-30-2012, 09:20 PM

You're either running really rich or your turbos are blown. From the color of the smoke, it sounds like you're running rich

03-28-2012, 07:09 PM	#1
M3_Dylan Lieutenant 32 Rep 520 Posts Drives: 2008 BMW M3 Join Date: Sep 2011 Location: Orlando iTrader: (5)	Just installed VRSF Downpipes and now black smoke at WOT :( I just installed my new downpipes and now when I WOT black smoke pours out. No smoke at idle or regular acceleration only at WOT. So my question is what did I screw up this time
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03-28-2012, 07:12 PM	#2
Ernerd Private First Class 4 Rep 160 Posts Drives: E92 335i SGM '07 Join Date: Oct 2011 Location: Virginia iTrader: (0)	I think that's normal. Either unburnt fuel or something else IIRC
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03-28-2012, 07:21 PM	#4
335okc Captain 42 Rep 659 Posts Drives: e90 335 Join Date: Feb 2011 Location: okc iTrader: (0)	i got black smoke even with all the cats at wot. i think/hope its just because I'm running rich 12-12.5 at wot.
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03-28-2012, 07:24 PM	#6
Brey335i Banned 112 Rep 4,771 Posts Drives: e46 ///M3 Join Date: Oct 2009 Location: Austin, TX iTrader: (11)	Less cats mean less filtration. I'd say you're burning oil.
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03-28-2012, 07:27 PM	#7
Elliott@DetailAddict Brigadier General 300 Rep 4,444 Posts Drives: E90 Join Date: May 2011 Location: Santa Clara, CA iTrader: (0)	Oil would be a blueish smoke. Black is a rich mixture of fuel.
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03-28-2012, 07:36 PM	#8
M3_Dylan Lieutenant 32 Rep 520 Posts Drives: 2008 BMW M3 Join Date: Sep 2011 Location: Orlando iTrader: (5)	I also forgot to mention I have had two misfires while WOT with this current set of spark plugs I have in...... I just haven't got around to replacing them think this could be part of the issue?
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03-28-2012, 08:32 PM	#11
Beemw335 Colonel 62 Rep 2,013 Posts Drives: 335i Join Date: Mar 2011 Location: My car is my home iTrader: (2)	What tune are you running. Log afrs
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03-28-2012, 09:57 PM	#13
dfv2 Lieutenant 30 Rep 474 Posts Drives: 2009 CTS-V Join Date: Apr 2010 Location: Upstate NY iTrader: (3)	Black is fuel, blue is oil, rainbow is skittles. In other words you're running rich, check your AFR and fuel trims. __________________ //ecg//
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03-30-2012, 09:20 PM	#15
Tiago@VRSF 2095 Rep 43,350 Posts Drives: F90 M5 Join Date: Dec 2007 Location: Doral, FL iTrader: (99) Garage List 2014 F30 328xi [0.00] 2015 F82 BMW M4 [0.00] 2013 Ducati 1199 Pa ... [0.00] 2008 BMW 335i [0.00]	You're either running really rich or your turbos are blown. From the color of the smoke, it sounds like you're running rich
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