What does 'overrun fuel cut' (DFCO — Deceleration Fuel Cut-Off) do and why is it tunable?
-
A
It cuts fuel during hard acceleration to prevent over-revving the engine
-
B
It shuts off injectors during closed-throttle deceleration above a set RPM to save fuel and reduce emissions
-
C
It limits fuel delivery when the ECT sensor reads above 230°F to prevent heat damage
-
D
It applies a fuel cut when MAP sensor voltage drops below a calibrated threshold during idle