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. More »

When a motorcycle engine has an emission system malfunction, such as an exhaust leak or a moment of running rich or running lean, backfire occurs as a result. When an engine is running rich, there is more fuel present th... More »

A fuel pump helps move fuel through a vehicle's engine. The fuel pump functions like the heart of the engine, pumping the fuel through the components to keep it running. Most pumps are electric in newer cars and keep a s... More » Vehicles Car Parts & Maintenance

When the explosive noise of a car backfire occurs, it usually indicates that the air-to-fuel mixture is unbalanced or that a problem exists with the vehicle's timing. A backfire is the result of fuel burning outside to t... More »

A tune-up on cars made before about 1990 consists of contact point, air filter and spark plug replacement, and the adjustment of igniting timing, carburetor and fuel mixture. A tune-up for cars made since 1990 involves s... More »

Cars backfire for several reasons, including air and fuel mixing due to leaking hoses or other mechanical problems. Faulty spark plugs or wires can cause a car to backfire. It can also occur when shifting to a lower gear... More »

A burnt engine valve causes a car to lose power, misfire, backfire or idle roughly. Fuel consumption can go up, and the exhaust system may develop a "putt-putt" sound. These symptoms get progressively worse until the val... More »