Thread: got a little smoking problem!

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I am having a puff of white smoke coming out of the tail pipe, it's starting to happen a more often , anytime I stop at the light and when I take off it blows a small cloud of smoke,I know my carb maybe a little rich,
could his be it ? someone mentioned to me that it could be the
valve guides, I don't know to much about buicks, but it's a little wagon I
picked up cheap and sort of want to keep it to make my deliveries,it has
a little 300 cu/in 2 barl.carb, ( good on gas) hope someone can help!!
thanks