$0D - CTS Spark Advance Compensation vs. Vacuum vs. Temperature
08-08-2014, 03:08 AM
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$0D - CTS Spark Advance Compensation vs. Vacuum vs. Temperature
I'm getting some knock only above 90 Celsius and was hoping to use this table to correct it. I need some clarity regarding this table, what are the units for the columns? 80-0 what exactly? The spark retards the further right you get I'm sure its not kPa? It seems strange that kPa is used everywhere but here.
08-08-2014, 07:11 AM
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Re: $0D - CTS Spark Advance Compensation vs. Vacuum vs. Temperature
It is KPa, in vacuum from barometric. So 0 KPa is WOT. 80 KPA being off the throttle decel.
The ECM calculates vacuum by subtracting the current MAP reading (in KPA) from the current barometric value.
Example: with barometric at 101 KPa (slightly above sea level) and the current MAP is 60 KPa (light cruise), the vacuum is 41 KPa.
RBob.
The ECM calculates vacuum by subtracting the current MAP reading (in KPA) from the current barometric value.
Example: with barometric at 101 KPa (slightly above sea level) and the current MAP is 60 KPa (light cruise), the vacuum is 41 KPa.
RBob.
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