There are several reasons that can cause backfire in an Edelbrock carburetor, including high-alcohol gasoline, carb adjustment level, engine temperature, speed reduction rate, muffler construction and the carburetor's sensitivity of internal transitional passage. Edelbrock carburetors are unaffected by engine backfires.
Backfiring is a condition of the engine popping or banging when idling down. Some possible causes for engine backfires include:
- Speed reduction rate
- Alcohol level of gasoline
- Muffler, solenoid or carburetor issues
- Troubleshooting issues
- Consulting with dealership
A quick rate of speed reduction and turning the engine off at a high RPM can cause fuel to ignite in a hot muffler, causing a backfire.
High levels of alcohol in gasoline can cause the engine to run hotter and it ignites easier, both of which cause backfiring.
The type of muffler may cause backfire or afterfire. Another cause may be the timing on the carburetor or a faulty anti-afterfire solenoid.
Reduce speed to idle in order to cool down engine before shutting it off. Change to reduce alcohol fuel and adjust the carburetor's settings.
If troubleshooting does not resolve backfiring issues, consult with an authorized dealer or the Edelbrock website for further assistance.