Question about 2006 Plymouth Scamp

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1967 barracuda carb backfires do I adjust screws in or out?

Do I adjust the screws in or out to stop backfire on my carter 4 barrel carb?

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  • feltsuit May 22, 2009

    a couple of weeks ago. it's been running a little rough.

  • feltsuit May 22, 2009

    backfires on accelaration through carb. no points it's electronic ignition. sometimes you can smell gas.

  • jakcars May 11, 2010

    when did the car start to back fire?

  • Anonymous Mar 18, 2014

    carter afb comp. series initial adjustments

  • Anonymous Mar 18, 2014

    carter four barrel afb competition series initial needle valve adjustments

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I would check the float level first if you are going to adjust the carb., carters like to flood and if you check your spark plugs you can tell if your running rich. The other adjustment you will make with a simple vacuum gauge.You should probally check distributor points,and timing as well. More info would help, like is it back firing up the carb or out the exhaust or when accelerrating or decelerating.

Posted on May 22, 2009

  • jakcars May 22, 2009

    Sound like your dumping to much fuel, which is likely drying out the valve making it pop. Check timing, check floats, set rpm,and adjust air mixture-rpm again. you should also make sure that the carb is right for your application. To big a carb will hurt performance if the motor can't use that much fuel.

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