FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM
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Car repair manuals for everyone.
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Chevrolet
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1987
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Sprint-Import L3-061 1000cc 1.0L Turbo VIN 2 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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Ignition Signal
Ignition Signal
Engine speed is obtained by integrating synchronized ignition signals within the ECM. The engine speed information is used to calculate injector basic injection time.