Improper fuel/air mix causes backfires.
When a automobile backfires, it means that something has stopped working properly in the emission process in the engine. There are a amount of matters that can determinant the improper fuel/air assortment which leaves unburned fuel in the exhaust manifold that may burn. The sudden explosion of the fuel that was sitting is the argument of the ear-piercing sound that is generally referred to as backfiring.
Fuel and Pump System
Fuel filters remove divers particulate, such as dirt and other contaminants that may be floating in the fuel before it enters the fuel development, and pumps the fuel to the engine from the receptacle. Provided the filter gets clogged that income the pump is damaged. When the pump is damaged, it means that there Testament be an incorrect fuel/air ratio, salient to the backfire.
If the intake valve is not opening and closing at the proper times, such as if the spark plugs fire before the intake valve closes, the spark will light the fuel that is in the intake manifold and cause the backfire.
This again leads to chemical buildup in the exhaust step due to the converter not disposing of the excess, causing the backfire.
The fuel/air ratio that is ignited depends abundantly on the intake valve.