i think the ecu can only flag a defective coil, you would need a knock sensor for each cylinder otherwise eh
All fuel injectors,coils & spark plugs are O.K,.....i have swapped them from other cylinders to cyl #2 and they did not work....they work fine on other cylinders but not cyl #2......valves leaking,mechanical fault and not electrical fault. How does ECU/ECM pick-up the misfire?
the 3rd wire on each coil is for feedback, so without 4 knock sensors or 4 lambda,s i cant see how the ecu can flag a mechanical missfirei think the ecu can only flag a defective coil, you would need a knock sensor for each cylinder otherwise eh
the 3rd wire senses the induction from the windings in the coil i guess ? so it can tell if a spark was generatedo.k,how does the coil feedback wire pick-up a misfire....that is mechanical,.......insufficient compression/valves leaking!!
All fuel injectors,coils & spark plugs are O.K,.....i have swapped them from other cylinders to cyl #2 and they did not work....they work fine on other cylinders but not cyl #2......valves leaking,mechanical fault and not electrical fault. How does ECU/ECM pick-up the misfire?
on a random or multiple misfire yes, but how can it detect a specific cyl#2 misfire ?Misfire monitoring by ECU
ECU constantly monitors instantaneous engine RPM acceleration due to each cylinder as it fires. Cylinder RPM acceleration below average of the cylinders or below program parameters, red flags a misfire for that cylinder.
May I suggest you check the number two ignition coil power supply and wiring continuity all the way back to the switching source?
on a random or multiple misfire yes, but how can it detect a specific cyl#2 misfire ?