Why do cars backfire? A backfire occurs when combustion takes place outside of the cylinder. Backfiring can be used to describe combustion occurring through the intake (traveling backwards) or through the exhaust, although this is also called afterfire. In this video we'll take a look at how an engine could have combustion travel up the intake.

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My next video will be "afterfire." Be sure to check this out to see how combustion could occur within the exhaust.

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