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Home >> GMC >> 1994 >> Forward Control 4.3 Z, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - Gasoline >> Fuel System >> Fuel Control >> Oxygen Sensor
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Oxygen Sensor

See ENGINE SENSORS & SWITCHES .

NOTE: If injectors are dirty, they should be cleaned using approved injector cleaning procedure before performing port fuel INJECTOR BALANCE TEST.
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