Car backfires through the carburetor are sometimes caused by a lean air/fuel mixture. Backfires may also be caused by a leaking hose, faulty plugs or the brand of fuel being pumped in.Know More
Backfiring is a loud bang or explosive sound that occurs while the engine is idling down or shortly after the engine has been shut off. Most backfires through the carburetor arise as a result of faults within the ignition system. Fixing these faults is often enough to solve the problem.
Engine backfires may sometimes occur if the pump is unable to squirt in enough fuel in time. This may be because the pump is plugged up or simply not working. Changing the pump fixes the problem.
A faulty ignition system is a possible cause of a engine backfire. For engines to run efficiently, the spark plugs have to ignite the air and fuel at the right time. Incorrect timing can lead to the fuel being ignited before the manifold intake valve closes, causing a backfire through the carburetor or exhaust.
Holes in the pipe leading to intake manifold may result in an increase inflow of air, which unbalances the air-fuel mixture ratio. A leaner ratio is more volatile, and more likely to cause backfires.Learn more about Car Parts & Maintenance
Coolant leaks and engine overheating are usually caused by a failing water pump. Automotive water pumps are designed to leak coolant through weep ports as a warning that they are failing. Aside from overheating, a distinctive grinding or whining noise caused by a bad bearing is also a symptom of a bad pump.Full Answer >
Carburetors work by using a venturi, which is a narrowing in the inlet tube, to cause the intake air speed to increase and create a vacuum. This vacuum pulls in fuel from the attached chamber through a hole in the venturi, called a jet.Full Answer >
Most Carter ball and ball, or BB, carburetors have the numbers stamped on the air horn, but other models can be in various locations, such as on brass or metal tags or stamped on the flange. Some older models came with cardboard tags only and are very hard to identify.Full Answer >
Adjusting a small engine carburetor is a simple job that involves adjustments to its idle speed and mixture settings. In addition, troubleshooting fuel supply problems before making adjustments to the carburetor rules out poor performance because of issues with the fuel supply.Full Answer >