backfiring

  1. Falcon67

    Need help!! 289 with 351 firing order issues

    Hi folks, I have a 1967 289 engine restored 8 years ago with a E-Street top end kit from Edelbrock and DUI distributor. I´ve been unable to finish with this car till this year. When we started it we realized that the only firing order that "works" is the one from a 351 and its imposible to set a...
  2. D

    Carb Spitting

    Hey, I'm looking for some tips after rebuilding my holley double pumper. When I stomp on the pedal (idling) the car will sputter and if I press moderately it will spit fire out the primary and air out the secondary. If I press the gas gradually, there's no issues and it revs as expected. It...
  3. B

    2004 3.9 V6

    Hey everyone, so in this past year I’ve been getting into backyard mechanics. And up until 2 weeks ago I’ve just worked on my F-150. I bought my dads old 04 from him. It sat in a woodline for 6 years. I’ve replaced the fuel pump, fuel filter, fuel injectors, spark plugs, spark plug wire harness...
  4. B

    8-year project build -- Backfiring through intake, not idling.

    Hi there. I have a 1988 Ford Mustang LX fox that has a 5.0 converted from speed density to mass air. This has been a long project for my dad and I, and recently we initially got it started for the very first time at zero degrees timing. It idled pretty well without stumbling around 1k, but...
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