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When I start up my truck when it's cold it smokes pretty good for a couple of minutes. However, if it is a warm day it doesn't smoke at all. When I changed my plugs/wires/cap/rotor last week two of the 8 plugs had oil residue on them. They weren't soaked/wet but you could sure smell it and they were black not the faint brown they should be.
Depending on the weather it smokes heavily for 2-5 minutes. I was hoping it was just condensation but the huge plume of smoke pouring out the exhaust when I'm driving down the road makes me think otherwise.