GM > Engine > Fuel Control > Accel Enrich


Acceleration Enrichment
Acceleration enrichment is a simple throttle transient fuel compensation calculation. Using the change in TPS (TPS delta) as the primary factor, the PCM calculates an Enrichment Fraction. The enrichment fraction is then added to the current commanded fuel. Various modifiers exist to control the rate and profile of the fuel delivery with time, also, other modifiers exist based on vehicle speed etc.


AE Qualifiers


AE Base Value


AE Modifier


Deceleration Enleanment
Deceleration Enleanment (DE) is the opposite function of AE. DE monitors for negative TPS transients and subtracts fuel accordingly.


DE Qualifiers


DE Base Value


DE Modifier