Location of knock sensor 1991 GM sierra 350 2500?
There is no "knock sensor" on a 4.0L engine
You can't, its done by the computer if you have a knock noise, replace the knock sensor. its locate on the back of the engine near the alternator.
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.
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.
It is screewed into the passenger side of the engine, just in front of the starter.
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.
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.
the knock sensor on a 91 camaro 305 in on the passenger side of the block, bellow the exhaust manifold. its a few inches in front of the bell housing., and has a single wire running to it. looks a bit like a temp sensor, or oil pressure sensor.
Behind the harmonic balancer (dampner) that is located behind the crankshaft pulley.
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.
Make SURE the engine is COLD. Then unscrew the old sensor and install the new one. Antifreeze will leak out of the engine so be quit when replacing it.