In the driver side head between the first 2 spark plugs.
A faulty engine temp sensor can do that.
Next to the thermostat housing.
A bad engine temp sensor can do that.
The temp sensor for the ECM (engine control module) is next to the thermostat housing.
Try replacing the engine coolant temp sensor.
Remove the tail gate then replace water temperature sensor.
Replace the coolant temp sensor next to the thermostat housing.
On the 4.3L it is located next to the thermostat housing. The electrical plug to it has two wires.
Drivers side of engine, between the #3 and #5 spark plug.
what is the wiring diagram for the o2 sensor on 2000 s10 blazer. it has 4 wires. what what do they all do /
The engine coolant temp (ECT) sensor on that 97 S10 2.2L would be found close to the thermostat.
knock sensor