Spark of 3.5 on decel?
Posted: Mon Jul 23, 2018 2:34 pm
Weird problem. On decel or coast as in when you lift off the gas to come to a stop ... after a few seconds the spark advance drops to exactly 3.5 degrees and stays there. The engine wants to stall but it keeps going most of the time. Is there a decel, or coast setting for spark? I've looked through the tables.
The MAP is in the 20 Kpa range, and RPM is in the 2400-1400 range. The lowest recorded spark for this area is 3.516. Only happens on decel with foot off the gas. The Wideband says super lean ... climbs to 20:1.
It feels like a setting for engine braking ... remove fuel, reduce spark, and coast. While it works ... having a bit more timing would help it stay running when you finally come to a stop.
This is a '165 computer running 12P code on a 4 cylinder.
... I'll continue reading the various tables.
Mark.
The MAP is in the 20 Kpa range, and RPM is in the 2400-1400 range. The lowest recorded spark for this area is 3.516. Only happens on decel with foot off the gas. The Wideband says super lean ... climbs to 20:1.
It feels like a setting for engine braking ... remove fuel, reduce spark, and coast. While it works ... having a bit more timing would help it stay running when you finally come to a stop.
This is a '165 computer running 12P code on a 4 cylinder.
... I'll continue reading the various tables.
Mark.