Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

air/fuel mixture

Discussion in 'The Garage' started by adamforsythe, Aug 31, 2005.

  1. adamforsythe

    adamforsythe 1/2 ton status

    Joined:
    Oct 16, 2004
    Posts:
    1,394
    Likes Received:
    0
    Location:
    Maine
    Hello,
    I have a 600CFM carb I need to adjust the fuel mixture. do I turn the two screws together or what? Tell me how to do it. Would adding headers, intake, UPGRADED HEI dizzy, plugs, wires, aircleaner upset my air/fuel mixture?
    Thanks
    Adam
     
  2. mrk5

    mrk5 The Sticker Guy Moderator Vendor GMOTM Winner Author

    Joined:
    Apr 20, 2004
    Posts:
    12,331
    Likes Received:
    1,039
    Location:
    Northern Colorado
    I usually do the following.

    Have someone sit in the truck with it in Drive and brake applied. Leave everything on the motor, air cleaner and all vacuum connections, etc. Then I use a handheld tach and adjust the mixture screws an 1/8 turn at a time to get the highest idle. I turn both screws for each adjustment.

    My father-in-law does it with the truck in park, everything on the motor. Turns one mixture screw in until you hear it affect idle, and then back out 1/8 turn. Do the same with the other screw. Then he does the proceedure one more time.

    Here lately I've just been taking it to a mechanic to do on their gas analyzer machine.

    Oh yeah on the first 2, start with the screws about 2 turns out.
     

Share This Page