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backfire through carb

3230 Views 18 Replies 5 Participants Last post by  CUZMOTEEFOOSWA
i did the scar mod and pair removal. I have no vacuum leaks and I followed all directions with adding three washers. I'm running a velocity stack and open exhaust.The plugs look perfect according to the picture chart. The more I turn the a/f screw out to richin it up, the worse it gets.It idles and starts perfect but as soon as you put a load on it the carb starts popping.I'm at the end of my rope.
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I had a simular problem on my 06 when i Put pipes and a jet kit in. tried riching the A/F but it also made it worse. Strang enough but when I leaned it out just a little more then when I made the first adjutment the proble was gone. no more poping and it runs better than ever.
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