if you are facing the engine it will be on the left upperside of the crank pully, on a target wheel. is it hard to remove and replace
inside the distributor
Driver side of the bell housing.
There is a crankshaft position sensor that measures how fast it rotates
In the distributor.
paste this into your browser...i could not get the link box to take.. but this should ansewr the question on the o2 sensor
No crank sensor, only the sensor in the distributor.
Look by the balancer.
On a 1991 Chevy van with a 4.3L engine, the crankshaft position sensor is typically located near the rear of the engine block, close to the transmission bell housing. It is mounted on the engine and may be positioned near the crankshaft or flywheel area. To access it, you may need to remove some components for better visibility and maneuverability. Always refer to a repair manual for specific details related to your vehicle model.
There are a few reasons. crankshaft position sensor, faulty fuel pump, fuel pump regulator, throttle position sensor, oxygen sensor. Need to have it diagnosed.
Rear of the engine block (firewall side), below the center spark plug, just above the oil pan.
On a 1991 Mercedes 500SL, the crankshaft position sensor is typically located near the crankshaft pulley, on the engine block. It may be found on the lower part of the engine, often near the transmission bell housing. Accessing it may require removing some components for better visibility and reach. Always consult the vehicle's service manual for specific details and procedures.
The first place I would look would be the crankshaft position sensor