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Jan 13, 2007 | 02:35 PM

Doug Maitlen

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From: Jasper Indiana

Exhaust

When I start my 79, a black liquid substance shoots out the tail pipes. If someone could tell me why it is doing that and a way to fix it, I would really appreciate it.

Jan 13, 2007 | 02:40 PM

TimAT

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From: Gladstone MO

C3 of Year Finalist (appearance mods) 2019

Soot and condensation maybe??

Jan 13, 2007 | 02:42 PM

Doug Maitlen

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From: Jasper Indiana

Why is it doing that? Is the car alright?

Jan 13, 2007 | 05:45 PM

panic

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From: Sorrento Italy

Quote:

Originally Posted by Doug Maitlen

When I start my 79, a black liquid substance shoots out the tail pipes. If someone could tell me why it is doing that and a way to fix it, I would really appreciate it.

my tvr griffith used to do that sometimes...i think it's condensation mixed with combustion residues, i'm not sure but i think it happens when the day before you drive into a traffic jams and anyway idle the car in traffic for long without revving it sufficiently for long...i dont think it's a bad sign for the engine anyway

Jan 13, 2007 | 05:57 PM

Z-man

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From: Foxfield CO 1970 Convertible

Nothing wrong with it. Pretty normal, although excessive soot might indicate a mixture that is too rich...

Jan 13, 2007 | 05:58 PM

Big2Bird

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Quote:

Originally Posted by Doug Maitlen

When I start my 79, a black liquid substance shoots out the tail pipes. If someone could tell me why it is doing that and a way to fix it, I would really appreciate it.

Water vapor is a by-product of combustion. Most noticable in cool air as it condenses. The black is carbon, proably resulting from a rich condition such as the choke is on.

Jan 13, 2007 | 06:31 PM

JoeRags

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From: Meriden CT

Quote:

Originally Posted by Big2Bird

Water vapor is a by-product of combustion. Most noticable in cool air as it condenses. The black is carbon, proably resulting from a rich condition such as the choke is on.

Condensation is perfectly normal for engines, its a byproduct of combustion. Once you shut the car off, sounds like your getting some water collecting in your pipes. From sitting, it picks up carbon soot from inside the pipes, and just blows out on startup.

Really nothing to worry about. Only issue could be excessive carbon which would indicate a rich condition.