• Holley 1920 Floods Coming to a Stop

    After running my vehicle and I turn it off, gas floods over into the intake flooding the engine. Won’t start. Could be fuel pressure – When the engine if shut off there should be some release of pressure. Make sure you have a vented gas tank. After running open the…

  • Holley 1904, 1 Barrel Vacuum Check Ball

    Vacuum Check Ball The 1904 carburetors for automatic transmissions have a nylon check ball and retainer clip that goes in the float bowl body where the throttle body mounts to the float bowl. The manual transmissions did not need this. In our Holley kit # K421, this check ball is…

  • Holley 1940 Float

    The Holley 1940 carburetor originally used a Nitropyl type of float and because they tend to absorb fuel over time, we recommend that they be replaced at each carburetor rebuild. Once a Nitrophyl float has absorbed fuel it will become too heavy and allow more fuel to enter the bowl…