Checking Misfiring

Checking Misfiring





^ Take a current reading with the diagnostic tool.

Misfire Cyl 1
Misfire Cyl 2
Misfire Cyl 3
Misfire Cyl 4






^ Drive the car with the same engine speed, air mass/combustion and coolant temperature as shown by Freeze Frame.





A few misfires in this load and engine speed range can be accepted.

Is any of the counters incrementing continuously?

NO ^ Remedial Action OK

YES ^ Fault Not Rectified - I