SOURCE: 2002 Chevy Trailblazer Engine Codes
This is actually an easy swap out. Remove the electrical connection, remove the retaining bolt and pull out old one. I believe the sensor is located in the front passenger side of the engine on this particular model.
SOURCE: Crank shaft position sensor
it should be behind the harmonic balancer at the driver side , front of the oil pan
SOURCE: where is the cam shaft position sensor on a 1991
i think you mean a crank shaft position sensor witch is located on the back of the motor towards the bottom. good luck
SOURCE: crank shaft sensor? is this the same as cam shaft
no each one has its own job,
crank sensor is counting crank shaft rpms
cam sensor is counting cam shaft rpms
is there any lights coming on just as this is happening?
i think you should have the fuel pressure checked when it dies out,you need at least 50psi at fuel rail
SOURCE: need to change the cam shaft position sensor but
the sensor is behind the lower pulley and the wire usually run down behine the water pump and serpintine belt. two bolts hold it on and it is best to degrease it first. You may want to remove the right front tire to get at it since it is basically right above the oil pan near the cam
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