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1977 Other Chevrolet Models High Hydrocarbons

Tiny
OPINCAR
  • MEMBER
  • 1977 CHEVROLET
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?
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Thursday, February 19th, 2009 AT 3:43 PM

1 Reply

Tiny
BILLYMAC
  • 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
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Friday, February 20th, 2009 AT 11:38 AM

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