- Mon Dec 21, 2020 11:46 am
#47203
I dont know your coil, or its specs, but your dwell compensation appears to drop off quite quickly. Also, the spark duration appears high!
Can I suggest a test.
With the engine warm and idling, reduce the Running Dwell until it just starts to mis fire. Then increase and decrease until you have found where it is just on the cusp. Then add 0.02 ms to the value.
The Dwell voltage correction slope compensates for the dwell charge when the voltage supplied to the coil changes.
As voltage decreases the dwell needs to be increased, for example when cranking, or extra load such as lights and/or AC.
As voltage increases, for example, as the rpm increases, the dwell needs to be reduced to avoid the coil overheating.
Its possible that your slope is removing to much dwell as the rpm and hence the voltage increases.
Can I suggest a test.
With the engine warm and idling, reduce the Running Dwell until it just starts to mis fire. Then increase and decrease until you have found where it is just on the cusp. Then add 0.02 ms to the value.
The Dwell voltage correction slope compensates for the dwell charge when the voltage supplied to the coil changes.
As voltage decreases the dwell needs to be increased, for example when cranking, or extra load such as lights and/or AC.
As voltage increases, for example, as the rpm increases, the dwell needs to be reduced to avoid the coil overheating.
Its possible that your slope is removing to much dwell as the rpm and hence the voltage increases.
Mere Mortal