1977 Other Chevrolet Models High Hydrocarbons

1977 CHEVROLET
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OPINCAR
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1977 Other Chevrolet Models

I have a newly rebuilt 350 engine in my 1977 1 ton. Last year my hydrocarbons checked at 203, this year they checked at 2650. How can I lean out the quadajet or is there an additiove that can be added to help the problem. Are ther smaller jets that can be installed in the carb?
Feb 19, 2009 at 7:43 AM
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BILLYMAC
  • ✓Experienced Mechanic
  • 2,204 POSTS
hi you can do a maj tune, adjust the timeing
and adjust the carb use a vac guage adjust until you have 18 inches of vacum at idle.make sure idle is at fact spec. good luck billymac
Feb 20, 2009 at 3:38 AM
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