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Duramax 6600 Discussion Forum for the Duramax 6600 Diesel Engine, including the LB7, LLY, LBZ & LMM engine specific topics.

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Old 01-15-2006, 05:59 AM
Black95TD Black95TD is offline
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Can't complain about my 05 LLY. Great performance and very good fuel economy. Quick question though - how much smoke should I see. If I jump on it hard, I can see a very significant black cloud behind the truck. Doesn't fog the whole road but leaves a definite smoke pattern out the right side. I thought there was suppost to be very little or NO smoke. Truck is bone stock and never been to dealer except to check steering.

Is this normal? Thanks for the input.
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2005 Regular cab, LLY Allison, new 7/05
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Old 01-15-2006, 06:13 AM
markrinker
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I have never seen any 'black' smoke from my '05 LLY. However, I don't think I've ever 'floored' it from a dead stop, either. It does see short requests for full throttle under load, but rarely RPMs over 3K.

While spanking a Ford Thunderbird 0-90mph the other night, I did see a haze in front of his headlights - but not black smoke as you describe.

[ 01-15-2006, 10:02 AM: Message edited by: Mark Rinker ]
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Old 01-15-2006, 10:47 AM
fishhead1076
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I must admit my 04.5 LLy amazes me when I'm under heavy acceleration, it smokes like all get out! She's bone stock!
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Old 01-15-2006, 12:38 PM
WNFD
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Mine does the same thing. I didnt think the Duramax put that much out? It almost seems like it loads up and then when you punch it it cleans it right out.
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Old 01-15-2006, 05:02 PM
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Dewey Faircloth Dewey Faircloth is offline
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Only see smoke a few time as getting on the big road and staying with the traffic.Don't always do it then.May just build up from around town driving
and then blow it out.Never thought of it as a problem.
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Old 01-15-2006, 05:12 PM
Kennedy
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I'd be curious how the smoke levels change with the latest "intake pop" calibration changes as they appear to decrease EGR psoitions/flow which may contribute.
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Old 01-15-2006, 05:23 PM
Black95TD Black95TD is offline
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Thanks for the replies. Guess this is one thing I won't be worried about.
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Old 01-16-2006, 05:16 PM
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ccole ccole is offline
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Kennedy,
Do you feel there will be a loss of power after the latest reflash to correct the turbo bark/pop?

Thank You,
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** ccole **
Past Rides: 1978 Chevy 5.7 Dsl; 1982 C-20 6.2L Dsl; 1984 Chevy 6.2 Dsl; 1986 Suburban 6.2L Dsl; 1989 K2500 6.2L Dsl; 1994 F250 7.3L; (2) 1997 F250 7.3L; 2004 Duramax; 2005 Duramax; 2006 Duramax; 2007 Duramax; 1995 6.5 Non-Turbo; 1994 6.5 Turbo; 2001 F350 7.3L, 2005 GMC Duramax (Current)
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Old 01-20-2006, 05:45 PM
mark45678
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As far as I can tell there is NO loss of power with the new reflash! if fact it maybe a little more power on tap! I think if your guys are seeing gray smoke your fine, but if its black check your air filter! Boost stick will help with the black smoke also. Had mine refashed 12/23/05 , get yours done you will be happy you did.
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