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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Vacuum leaks would cause a lean condition, not a rich. Where do you think you have vacuum leaks? And usually, if you had vacuum leaks and/or a lean condition, you would get popping through the carb.
And Geezer is right, scoring cylinders is a very common symptom of carb issues.