Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Chevy 350: Black smoke, is it oil or gas
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Old 12-19-2005, 08:36 PM
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Black is fuel
Blue is oil
white is water

I would fire it on a test stand first and examine the color of the smoke in addition to running a compression check. Look for about 150 in a good 350 chevy, or at least that all cylinders are within 10%. Even at 10% 115 psi is on the low side.
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