PL720 4WD L4-2389cc 2.4L SOHC (Z24) (1983)
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Fuel Shut-off Solenoid: Description and Operation
Fig. 34 Fuel shut-off system (Typical)
Refer to Fig. 34 for a typical fuel shut-off system. Complete system schematics are located in ``Vacuum Hose Routings.''
This system shuts off fuel supply during deceleration to reduce fuel consumption and help prevent a temperature rise in the catalytic converter during
long periods of deceleration.
When manifold vacuum increases above a predetermined value during deceleration, the vacuum switch sends a signal to the anti-dieseling solenoid
valve which shuts off fuel supply. When manifold vacuum drops below the predetermined value, this system is deactivated. This system is also
controlled by the clutch switch, neutral switch, and inhibitor switch so that fuel is not cut off during certain conditions even if manifold vacuum is high
enough to operate system.