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Home >> Jaguar >> 1989 >> XJ-6 L6-3.6L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Description and Operation >> Overrun Fuel Cut-Off
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Overrun Fuel Cut-Off

PURPOSE
Improves fuel economy and aids in emission control.

OPERATION
The ECU initiates fuel cut-off (cancels injector operation) when throttle is closed, engine speed is above 1100 rpm, coolant temperature is above 86°F (25°C) and 1500 rpm has been exceeded since engine start.
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