11-19-2009, 12:45 PM | #1 |
Rolling along...
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Black soot in exhaust pipes?
I've noticed with my car that the exhaust tips always seem to get coated quickly with black soot after washing them. Usually that is a sign that the car is running rich. I've had cars in the past do this but never to this extent.
Even my brand new SOLO kit only took about a day or two for the tips to get coated and lose their shine on the inside. When I picked up my stock exhaust from the shop this morning, I noticed that the inside was absolutely coated from front to back with this crap. Even the drain holes in the mufflers were leaving black streaks on the undersides as moisture seeped out. On the upside, all that soot makes identifying poor welds easier. My stock exhaust had a small leak on the connection for the H-pipe on the passenger side. It's got a nice black line where the soot is escaping and coating the outside of the pipe. Is everyone else seeing this problem with their V6's? Anyone asked their dealer to check into it yet?
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11-19-2009, 12:49 PM | #2 |
2G1FC1EV1A9110079
Drives: 2010 2LT/RS, 2013 2SS/RS 1LE Join Date: Jun 2008
Location: Arizona
Posts: 4,756
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my tips get coated really quickly too. Never really thought much about it though, although i don't remember the stock ones getting quite so coated as fast.
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11-19-2009, 12:50 PM | #3 |
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GM has the V-6 and V-8's running super rich. I guess it is to save the cats but isn't polluting more running to rich?
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11-19-2009, 12:53 PM | #4 |
Drives: 2011 challengerR/T , 2010 Ram R/T Join Date: Aug 2008
Location: Lafayette Indiana
Posts: 1,186
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The tips on mine get soot on them when I use 89 or 90 octaine gas, this dosen't happen nearly as much with 87 fuel, dealer checked computer and indicated normal..
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11-19-2009, 12:54 PM | #5 |
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mine does it to but i have the v8 but im pretty sure all cars r doin it and is pretty normal
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11-19-2009, 12:58 PM | #6 | |
Rolling along...
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Quote:
My '97 C1500 (sold) and my wife's '04 Expedition are both V8s and they had a little bit of soot but nowhere near as much as my V6 Camaro does.
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11-19-2009, 03:35 PM | #7 |
Account Suspended
Drives: 2010 Camaro Rally Yellow 2LT Join Date: Aug 2009
Location: Smithtown, NY
Posts: 689
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Yep, I have lots of soot in the tailpipes. More noticeable after the exhaust was installed. Without a good tune we probably are running rich and not noticing the max performance that these cars can put out.
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11-19-2009, 04:35 PM | #8 |
Drives: 2010 ABM SS #14 of 2,027 Join Date: Jan 2007
Location: New York
Posts: 1,217
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I have run nothing but 93 in my SS and have the same black soot on the tips..I am assuming that it is running rich. hopefully my new Vararam will lean it out just enough to maybe make a bit of a difference. We shall see.
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11-19-2009, 06:33 PM | #9 | |
PWA Relapse
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Quote:
Theres a dyno sheet around here somewhere (from a long time ago) that shows the exact number... - X
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11-19-2009, 09:08 PM | #10 |
Deep6
Drives: 2016 Camaro #182300 | 2SS | HBM Join Date: Apr 2009
Location: Lansing, MI
Posts: 1,203
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soot - Yes - lots of soot
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11-20-2009, 03:48 AM | #11 |
:chevy:
Drives: 2LT/RS Join Date: Jun 2008
Location: Toronto
Posts: 13,033
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Yeap was told my car was running really rich when asking other members about my car feeling weak. It seams to be a bad thing but is it normal for our cars, are Rey tuned purposely to run rich? It annoys me like hell, none of our other cars do this, not even close o the camaros extent
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11-20-2009, 05:20 AM | #12 | |
Red Brick of Vengeance!
Drives: 12 Second Brick Join Date: Jun 2009
Location: at my pulpit
Posts: 7,745
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Quote:
The other thing to remember is the LLT is running a very high compression ratio especially when you consider it is running on 87 octane! So basically you douse things with gas to prevent pinging... IIRC... Also... wife's Acadia has the same LLT motor.. tips are always black..
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11-20-2009, 06:26 AM | #13 |
Drives: 68,69,72&10 Camaro's 12 CTS-V Join Date: Sep 2009
Location: Hampton Bays,NY
Posts: 193
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Mine is the same way. I know on my car after I installed full exhaust and cai the tips looked clean. A few days later I got a tune and now they are black.
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11-20-2009, 07:30 AM | #14 | |
:chevy:
Drives: 2LT/RS Join Date: Jun 2008
Location: Toronto
Posts: 13,033
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Quote:
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