Why does a Car Backfire?

Answer

A poor mixture of air and fuel is what causes a car to backfire. The backfire can occur in two different places, the exhaust pipe at the rear of the car, and inside the intake manifold.
Q&A Related to "Why does a Car Backfire?"
Improper timing can result in both intake and exhaust backfires. A timing that is too advanced will detonate the spark plugs even before the intake valve gets a chance to fully close
http://www.ehow.com/info_8039252_causes-cars-backf...
1. Start your vehicle and bring it to operating temperature. Ad. 2. With your foot on the accelerator pedal, turn the engine off and push the pedal to the floor. 3. After a few seconds
http://www.wikihow.com/Make-a-Car-Backfire
Bad ignition timing or fuel getting to the exhaust.
http://wiki.answers.com/Q/What_makes_a_car_backfir...
Most causes of backfires in the exhaust system can be addressed by troubleshooting
http://www.chacha.com/question/what-causes-backfir...
1 Additional Answer
A car can backfire for a number of reasons. Most likely it's because your injectors are pushing too much fuel, and not all of it is getting burned.
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