Quote:
Originally Posted by 81GMCSierra1500
Geezer, I found out it isn't worth rebuilding, it has too many vacuum leaks, and frank, it is a Q-Jet. It isn't running too too rich, it is showing minor signs of a rich mixture, and fuel smoke out the pipes at startup and in park when revved, but I'm thinking it won't be a dire emergency, but it it is, I will replace asap.
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Try hooking your vac advance to the manifold port on your carb and then turn your idle down.
You could be idling on the power circuit causing the rich smoke you see.