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As far as dangerous to humans, probably the only serious risk is to hearing. As far as dangerous to the vehicle, the backfire can certainly cause minor damage, especially to some carburetor diaphrams (especially Holleys). A backfire can also shoot flames or hot gases out of the carburetor, burning anything in the way.

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14y ago
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15y ago

Sure, just switch the spark plug wires on the number 1 and number 2 coils, start it up and hit the gas.

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Q: Is backfire on a car dangerous?
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