Backfire meaning

Backfire definition

Passage of unburned fuel mixture into the exhaust system where it is ignited and causes an explosion (backfire) prematurely.
2. Sometimes ignition takes place in the intake manifold by a flame from a cylinder because the intake valve leaks. Burning of the fuel mixture in the intake manifold may be caused by faulty timing, crossed plug wires, leaky intake valve, etc.

Dictionary of Automotive Terms Index

Automotive terms beginning with "B", page 2

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