• Holley 1945, 1946 Troubleshooting

    Why Does My Carburetor Die After Idling For Awhile? My best guess is too much gas. While the engine is idling look down the carburetor throat. If gas is dripping out of the venturi, then gas is dribbling into the intake. You will probably see black smoke out of the…

  • Autolite 4300 Secondary’s

    The 4300 secondary’s are hooked mechanically to the primaries and open when the primaries are 3/4 open. Each of the secondary venturi has an offset air valve plate located below its booster venturi. These plates ae preloaded by a spiral torsion spring, which holds them closed when the secondary throttles…

  • Bad BMW Fuel Injectors

    Symptoms of Bad BMW Fuel Injectors BMW vehicles are known for their excellent performance and superb durability but it is also a fact that every vehicle tends to face some drivability issue at some point. Although BMW vehicles are highly reliable and do not break down easily, you can still…

  • Fuel Injector Repair Kits

    One of the most common injector failures are the rubber parts, or O-rings. What Is a Fuel Injector Repair Kit? Aside from the fuel injector housing itself, there are other small pieces that are subject to deterioration. The fuel injector repair kit can include a pintle cap, various o-rings, and…

  • How Does The Electronic Carburetor Work?

    If you are passionate about cars, you probably know about constant choke carburetors, constant vacuum carburetors, and multiple venturi carburetors. However, did you know that there is also another type of carburetor that is rarely mentioned? We are talking about electronic carburetors. To be fair, electronic carburetors are not a…

  • Rochester B Float System

    The float controls the float level in the Rochester 1 barrel carburetor. The float has 2 pontoons which sits on both sides of the float bowl. A needle valve is used to turn the gas on and off as needed. As the gas level drops so does the float allowing…

  • What is E.F.E Early Fuel Evaporation

    What is an E.F.E? E.F.E or early fuel evaporation system which is also referred to as carburetor heat insulator and electronic fuel evaporator is found in some old internal combustion engines. The main purpose of an early fuel evaporation system is to provide rapid heat to the engine induction and…

  • Fuel Injection Troubleshooting

    Engine Cranks But Does Not Start Ignition bad – check battery, distributor, plugs, coil and timing. Engine defect – compression, oil pressure, valve adjustment. Air intake leak – vacuum leak – check all hoses and connections. Fuel blockage – dirty fuel filter, kinked fuel hose, non injection type hose being…