Coasting Fuel Cut (CFC) System
PURPOSEImproves fuel economy by closing the slow speed circuit (uses anti-diesel solenoid) in the carburetor during coasting.
LOCATION
On right side of carburetor body.
OPERATION
The coasting fuel cut (CFC) system activates the carburetor anti-dieseling switch during deceleration, closing the slow system fuel passage. The EFC System control unit detects deceleration when the following conditions are met:
^ Intake manifold vacuum is below 590 mmHg (23.23 in.Hg) when the A/C is "OFF" and below 490 mmHg (19.29 in.Hg) when the A/C is "ON."
^ Vehicle speed is at least 40 km/h (25 mph).
^ Engine speed is at least 1800 rpm.
When the control unit determines that the vehicle is decelerating, current to the anti-dieseling switch is interrupted, stopping fuel flow through the slow system passage. When coolant temperature is below 80° C (176° F), the control unit will not signal the system to stop fuel flow.