Operation CHARM
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Pontiac
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1988
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J2000/Sunbird L4-121 2.0L
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Repair and Diagnosis
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Powertrain Management
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Relays and Modules - Powertrain Management
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Relays and Modules - Computers and Control Systems
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Engine Control Module
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Description and Operation
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Modes of Operation
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Fuel Cutoff Mode
Fuel Cutoff Mode
When the ignition is turned off, no fuel is delivered by the injector to prevent dieseling. Fuel will also not be delivered when no reference pulses are seen to prevent flooding.