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Old 10-15-2017, 12:38 AM   #495
evilokc
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Join Date: Mar 2013
Location: albuquerque New Mexico
Posts: 522
Re: What did you do with your truck today, Part 3

very annoying night guys. I went on the quick fuel site and read up on what they call correct carb tuning. they suggest warning up the motor,lowering the idle with the idle screw until its just about to stall, bottoming out the 4 mixture screws and turning them out 1&1/2 turns and hook up a vacuum gauge to the manifold port. then you watch the vacuum when you turn the mixture screws out 1/4 turn. if the vacuum increases you repeat until you hit the max vacuum. repeat that on all 4 corners. you have to use the idle screw to keep the idle at the same rpm as you mess with the mixture screw. so I did all that and hooked up my vacuum gauge and boom...it didn't work. the vacuum gauge was given to me years ago and I have never used it. so my idle is so low now that the motor runs but is unhappy. I will buy a new gauge tomorrow and maybe an optical tach to finally get into the meat of tuning. then I can move onto the main jets.
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