Spark retard for cold idle


Definition:

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Description:

Hints:
Spark adder as a function of Barometric Pressure BP. Input = BP and Output = spark adder. Normal Closed Throttle Spark is a function of RPM and ECT, modified by the Spark Feedback Multiplier. During High Cam (as determined by RPM and the Startup Timer), the spark advance is reduced by Spark Retard for Cold Idle to light off the catalysts (by heating up the exhaust gas).