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Home >> Jeep >> 1982 >> Scrambler Base, 4.2L Eng VIN C, Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Auxiliary Emission Control Systems >> Computerized Emission Control >> Operation >> Data Sensors >> Engine RPM

Engine RPM

Voltage is supplied from tach terminal on distributor. Until a voltage equal to a pre-determined RPM is received by MCU, the system remains in open loop mode, resulting in a fixed rich air/fuel mixture for engine starting.