Operation CHARM
: Car repair manuals for everyone.
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1985
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Skyhawk L4-112 1.8L Turbo VIN J FI
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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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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Deceleration Mode
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Deceleration Mode
In the Deceleration Mode, the ECM senses changes in throttle position and manifold pressure of air flow and reduces fuel delivery. When decelerating very rapidly, the ECM can cut off fuel completely for short periods of time.