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Home >> Cadillac >> 1987 >> DeVille V8-252 4.1L >> Repair and Diagnosis >> Powertrain Management >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Description and Operation >> Starting Mode
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Starting Mode


When ignition is first turned on, the ECM energizes the fuel pump for two seconds and pressure is built up at the injector unit. The ECM then checks coolant temperature sensor, TPS and crank signal and determines proper air/fuel mixture for starting.



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