Question about 1984 GMC VanDura

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I have a 1981 GMCvandura 25 with a 350 4bbl carb. the choke.

The choke dosent work well. I cleaned it with carb cleaner but it only helped a little. I want too recheck the, air fuel,choke leanness or richness settings but cannot find the information on line to download and would like to do this quickly.Thank You for YOUR Time.

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Its all in the idle screws, if there bad you will be chasing them every time you drive it, also the choke spring inside could be bad, if you have a that style. screw the idle in on both sides all the way in, then back out 2 and a half turns, this should be where you will run the best. adjust as needed, but that is the standard. i also run sea foam through the carb, alot better then any cleaner on the market. usr it in your fuel or try to put it in the carb, i have uesd the vacume lines to do this, but you will also have to keep the car at high idle when doing this, it will clean all of the junk and carbon out of the entire motor.

if you need more help, please be clear or the carb, and hat you have done and not done already'

thanks

Posted on Jun 19, 2009

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