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backfire on acceleration

  1. 390 tuning, backfire through carb on heavy acceleration

    Engine
    Hi, everyone. Please help me with tuning my 390 engine. My problem is that I get a backfire when I push the pedal down more than about half way at once. It'll backfire through the exhaust, but mostly the carburetor. I've messed around with it quite a bit with little progress. My setup is a basic...
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