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2013 Chevrolet Suburban
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85 suburban smoking help

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Old October 10th, 2011, 7:15 PM
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Default 85 suburban smoking help
can anyone help i just bought an 85 suburban k20 carbed 350 ran great for a 3weeks now it runs ruff and smokes bad like bug killer bad any ideas
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Old October 10th, 2011, 7:29 PM
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What color is the smoke?
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Old October 12th, 2011, 9:23 PM
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blueish white i think its valve seals but that shouldnt cause it to run ruff
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Old October 13th, 2011, 9:55 AM
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are your loosing antifreeze?

usually a head gasket if your blowing white/blue smoke...
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Old October 13th, 2011, 1:46 PM
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Head gasket will cause white smoke, and run rough.
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Old October 13th, 2011, 2:17 PM
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check your compression...i bet one or more is low.
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