F 350 2WD Pickup V8-351 5.8L VIN H 4-bbl HP (1985)
Oxygen Sensor: Description and Operation
Fig. 8 Exhaust gas oxygen (EGO) sensor
The exhaust gas oxygen sensor supplies the ECA with a signal which indicates either a rich or lean condition during engine operation. The sensor is
threaded into the center of the exhaust manifold on 4-140 and 6-300 engines, threaded into the rear of left and right exhaust manifold assemblies on
V6-171 engine or threaded into the rear right exhaust manifold assembly on V8-302 and 351 engine, Fig. 8.
