Exhaust Back-Fire (Complete Guide)
Updated: Jan 9
Exhaust backfire is a phenomenon that occurs when unburnt fuel is ignited in the exhaust system, resulting in a loud popping or banging noise. It is a common problem that can occur in both gasoline and diesel vehicles and can have a number of causes.
Table of Contents:

Causes of Back-Fire
There are a variety of causes of backfire in a vehicle with an internal combustion engine, including the following.
Malfunction ignition system
Rich air/fuel ratio
Bent valves
Timing issues
Damaged distributor