There is no "knock sensor" on a 4.0L engine
The function of the knock sensor ob a sensor on a 1991 4.3 s10 is to provide the computer the position of the crank shaft to give it the right information to get correct timing. That would be the crank position sensor. The knock sensor monitors the engine for spark knock (ping) so the ECM (Engine Control Module) can retard the timing to eliminate it.
The knock sensor is located in the block, under the intake manifold. You have to basically remove the top end of the engine to get to it. The pigtail which connects the sensor to the harness is usually the culprit. It is notorious for failing but after spending all the time and money for gaskets I would recommend replacing the sensor as well.
There is no knock sensor on a 94 4L jeep engine. In 1991 when they changed to the 4L HO motor, they removed the knock sensor from the system.
where the map sensor on 98 blazer?
airbag sensor and iat sensor are not the same thing... wiki
It is screewed into the passenger side of the engine, just in front of the starter.
The knock sensor is located on the left side of the block. Often the steering shaft will contact and wrap the wiring harness around it, braking the connector. You should check this first, before replacing the sensor.
The knock sensor on Nissan 300ZX non-turbo from 1990 thru 1996 is located below the lower intake manifold on the rear of the engine block. To replace the knock sensor the upper and lower intake manifolds need to be removed. It is always best to replace the knock sensor with a new one considering its major dissasembly.
Directly under the lower intake manifold. the connection for this sensor is below the throttle body. If replacing sensor the sub harness should be replaced as well. Assuming it is a V-6 it is directly under the lower intake manifold. connection can be found under throttle body.
it is under the distributor.
There's many sensor, O2 sensors, (Palet type ) Airflow sensor, Throttle body position sensor. Knock sensor and probably much more for brake, speedo and transmission.