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Old 06-02-2008, 06:49 PM   #1
drewfever1020
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Join Date: May 2008
Location: san antonio, texas
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question?

what does it mean if a little smoke comes of the carburetor?
from the top!
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Old 06-02-2008, 07:41 PM   #2
89 crew
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Re: question?

It could mean many things. Do you have any more details about the conditions it does it under?
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Old 06-02-2008, 08:00 PM   #3
LONGHAIR
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Join Date: May 2004
Location: Columbus OH
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Re: question?

Smoke?....Fuel Vapor

You can sometimes see fuel vapor, at idle, especially with higher over-lap cams. It is called "stand-off", "reversion" or sometimes "blow-back".
It is more common to V-twin engines because of the odd-firing, but it can happen in nearly any engine if the right conditions are met.
As long as it is not so bad that it soaks the air filter, it doesn't really hurt anything.
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