Back-fire

A misfire is an inflammation of the air -fuel mixture in an internal combustion engine in the hot exhaust pipe rather than in the cylinder. The misfire generates a pop in the exhaust and the exhaust system can be the catalyst and lambda probe damage.

Misfires occur, for example when in a gasoline engine, the spark plugs ignite no longer reliable or when responding in a damaged leaky exhaust strand fresh air with still unburned fuel.

In order to create intentional misfire at shows, in showcar an existing switch for interrupting the ignition is activated.

In motorsport misfires occur very frequently, since it is often not coupled to a gear change, but working with Zündunterbrechern to relieve the crankshaft and thus the transmission momentarily. The unburned fuel is then placed in the hot exhaust tract and there burns explosively to hear often by a loud bang shortly after the gear change. The exhaust manifold and the entire exhaust of racing engines, however, are designed for this tremendous burden.