Exhaust Backfire, Carb Cough
#11
A lean condition in an engine can cause exhaust backfires when the air-fuel mixture doesn't have enough fuel and too much air. When this mixture combusts, it burns more slowly, so there's still unburned fuel in the exhaust when the valves open. This fuel can then explode and create a loud popping sound.
A lean mixture can also cause a backfire in the intake, the slow burning fuel air mixture is still burning when the intake valve opens, causing the fuel in the intake to ignite.
Last edited by Dan89FLSTC; 08-29-2024 at 10:06 AM.
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