Engine backfiring occurs when the spark plug ignites fuel in the cylinder outside of the normal combustion process, when the exhaust valve is open. Some common causes of backfiring include a rich fuel-air mixture from a dirty air filter, retarded timing where ignition is not synchronized with the piston cycle, and issues with the distributor cap like damage or moisture that cause sparks to travel to the wrong cylinders. Identifying the cause of backfiring is important to fix engine issues.

2. Most of the people have
actually seen an engine
backfire but fail to
understand the actual issue
and what causes it?

3. Backfiring is the process of a
spark plug, or multiple spark
plugs, igniting the fuel in
their cylinder out of turn, in
a part of the combustion
process where the exhaust
valve is open on that
cylinder.

4. Here are some causes of
engine backfire which will
let you know the actual
reason behind the issue.

6. If your engine is being
supplied more fuel than it
needs to burn efficiently,
then it’s called a rich fuel to
air mixture and can be
caused by a dirty air filter.

7. Whenever an engine runs
too rich there is too much
fuel to create an explosive
fast-burning flame and the
fuel burns slower & isn’t
complete before the exhaust
part of the engine cycle.

8. When the exhaust valve
opens on that cylinder, the
extra air allows the
unburned fuel to explosively
burn and the popping noise
of a backfire is heard.

10. This is one of the most
leading reasons due to
which an engine misfire
occurs and is also known as
retarded timing.

11. This means that the engine
cycle of fuel-compression-
ignition-exhaust in the top
end isn’t in sync with the
bottom end.

12. This causes the ignition
cycle to begin late in the
combustion chamber and
ignite the fuel when the
exhaust valve is opening.

14. In cars that don’t have
ignition coils on the spark
plugs a distributor cap and
wire set are used to send
the electrical pulse to the
spark plugs.

15. If the distributor cap is
damaged, then moisture can
get in and cause the spark
from one cylinder to go to
another incorrect cylinder.

16. Whenever the incorrect
cylinder fires out of time
and the exhaust valve is
open simultaneously, you
will experience an engine
backfire.

18. The cars where the
distributor cap is used all
the spark plug wires are
attached to the top of the
distributor cap.

19. In due course of time, the
environmental factors can
cause the spark to travel
from one spark plug wire to
another in close proximity.

20. When this happens
frequently a carbon track
forms which is like a
shortcut for the spark and
causes a misfire very similar
to that of a cracked
distributor cap.

22. The above-mentioned
factors are some of the
reasons behind the engine
backfire in your car.

23. Whenever you experience
an engine backfire, then
take your car to an
automotive shop to fix the
issue as soon as possible.

24. http://foreignautomotive.ca/
https://www.facebook.com/
ForeignAutomotive/
https://www.youtube.com/
watch?v=UxcmSVugv6A
Thank
You!