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Spark plug wires are installed incorrectly, or the enigne is out of time. Too much fule that is not being combusted in the engine. Fuel gets into the hot exhaust, then ignites.
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∙ 16y ago
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What causes backfire from exhaust pipe?
Unburned fuel in the exhaust system causes the backfire from the exhaust pipe.
What causes an exhaust backfire on lt1 camaro?
I think you are hearing pressure pops. Not a backfire.
Why does your snowmobile backfire?
unburned fuel in the exhaust ignites
What causes a backfire in a motorcycle?
a backfire is caused by incorrect timing or not enough back pressure in the exhaust pipe
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Too rich-unburned fuel in exhaust.
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backfire timing off
What causes a 1973 Pontiac 350 engine to backfire through the exhaust?
A large backfire is most likely caused by a bad spark plug or plug wire. Unburned air and fuel pumped into the exhaust will often be ignited by the other cylinders still burning exhaust gases. Also check your ignition timing, if it is late and you have a rich mixture you can get a backfire. An exhaust leak will let air enter the exhaust under deceleration and cause a "popping" sound.
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you have a leak in the exhaust system lets in air
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bad plugs or wires i just had this problem to or it could be a leak in the exhaust
Why does your car backfire while driving it?
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What causes a motorbike to backfire?
unburnt fuel wich goes to your exhaust, where because of the heat ofcourse is set on fire and then strikes flame out of your exhaust! sorry for my English
