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To adjust the idle circuit fuel mixture, take a screwdriver and turn the screw on both sides of the carburetor until it slows the engine. Prepare a carburetor for adjusting the air and fuel mixture with help from a specialist in car restoration in this free video on car maintenance and auto repairs. Expert: Gabe Braedt Bio: Gabe Braedt currently works restoring car bodies at a local shop. Filmmaker: stephen kuykendall

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16 Responses to “Car Maintenance : How to Adjust Air & Fuel Mixture on a Vehicle’s Carburetor”

  1. sasuke1luigi65 says:

    Woot First

  2. GTAmaniac612 says:

    WOOT who cares.

  3. zingerz350r says:

    Do you do this when the car is warm or cold?
    What about using a vacuum gauge?

  4. 0killermike0 says:

    Operating temperature, thinking 140F-180Fdegrees depending on application.

  5. afjbernz38 says:

    really he is eating his words..can’t understand well…when he talks

  6. mobbn56 says:

    koo many you rally helped me u cut all the bs out and got straight to the point! : )

  7. gst69man says:

    good vid. I would loose expertvillage affiliation as most of their vids are not good imo. I just stumbled onto yours thanks

  8. ThundareRed says:

    i know ur comment is old but, u should do it when the engine is hot so there is no choke on.

  9. nightmathzombieethan says:

    AAArgh! I wish I had a holley or an edelbrock! I’m drivin an old Honda and trying to get my “Keihin 3 Barrel” (Ha Ha Ha) tuned in after a rebuild…..

  10. TheZappersdoopable says:

    @nightmathzombieethan You have a good carb… It just takes time to get it right… Also… I like Holley a lot more than Edelbrock…

  11. nightmathzombieethan says:

    heck, I’d be happy with anything! Weber makes carbs for my car but I don’t think they are California Smog legal….
    I’ve got my carb “Dialed in” enough to run/idle well, it starts right up and it doesn’t run too rich or anything, I still can’t seem to pass smog though….. I’m thinking my problems MAY be elsewhere (EGR, cause I’m failing on NOX)…
    Don’t know if this smog jargon makes sense to you….but either way sometimes living in California is a pain in the butt!

  12. TheZappersdoopable says:

    @nightmathzombieethan Yeah… I don’t know much of anything about CA models or smog laws… I live in AR and here we can do anything we want… An exhaust shop won’t cut “cats” off but we ourselves do and nothing is ever done about it… We don’t even have basic vehicle inspections anymore… The cops can still give tickets for broken lights and windows… That’s about it though… Oh…and “unsafe” tires… Even then it is usually warnings… Verbal and/or written… Try some websites out…

  13. tucsondog says:

    Cut a couple air inlets in your exhaust 😉

  14. nightmathzombieethan says:

    You think? At this point I’m not averse to trying any “Tricks”!
    I wish I could find a smog guy who wanted to make a few hundred extra….
    If I tried this, wouldn’t they notice the “Leak” though?

  15. tucsondog says:

    I have a friend who does this. They cut open little notches on the top part of the tubing (out of sight…) and it’s worked for the last 6 years. Apparently it draws fresh air into the exhaust pipe reducing the recorded ppm of “smog”. On the other hand, you could just lean it out and tell the inspector you got some bad gas at the station…

  16. nightmathzombieethan says:

    You sir are a BAD INFLUENCE!!!!….
    LOL I like the idea….
    Hmmmmmm It makes sense, I think there would be enough backpressure to create vacuum if it was right up near the exhaust ports, high up on the manifold…. I think my only concern would be that if I got it wrong and there wasn’t a vacuum, there would be pressure, and hence lot’s of Noise (Which might make the “Leak” obvious)…
    How big/how many/where were the notches?

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