Operation CHARM
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Chevy Truck
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1988
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S10/T10 P/U 4WD L4-151 2.5L
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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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Acceleration Mode
Acceleration Mode
In the Acceleration Mode, the ECM senses rapid change in throttle position and manifold pressure and provides a corresponding amount of added fuel.