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(3) Attach electrical connector to sensor. INSTALLATION - 1.6L (1) Make sure that the manifold is clean. O2 SENSOR DESCRIPTION The upstream oxygen sensor (Fig. 41) threads into the outlet flange of the exhaust manifold (Fig. 39). The downstream heated oxygen sensor threads into the system depending on emission package (Fig. 40). OPERATION A seperate upstream and downstream grounds are used on the NGC vehicles (4 Cyl.). As vehicles accumulate mileage, the catalytic con- vertor deteriorates. The deterioration results in a Fig. 37 MAP Sensor 1 - MAP SENSOR Fig. 38 IGNITION COIL, PCV, MAP SENSOR 1 - MAP Sensor Fig. 39 Upstream Heated Oxygen Sensor 1/1 1 - OXYGEN SENSORS Fig. 40 Downstream Heated Oxygen Sensor 1/2 14 - 40 FUEL INJECTION PT MAP SENSOR (Continued) |