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The most common cause of this condition is a failed crankshaft position sensor. If you have a tachometer or a scan tool (not a code reader) check for an RPM reading while cranking. An RPM of 0 while cranking usually indicated a failed sensor. If you crank the engine for 30 seconds and if the crank sensor is bad, it will set a PCM code which you can check for using any OBDII code reader.
If you must replace the crankshaft position sensor, I recommend the following procedure to avid great difficulty that can be caused if you break the sensor off in it's bore:
1) Unplug the electrical connector and move the wire clear of the area.
2) Get a fire extinguisher handy. You won't need it, but safety is important.
3) Remove the bolt from the sensor.
4) Try to very gently twist the sensor. If it twists, remove it and install a new one. Otherwise continue:
5) Use a torch to head the sensor and the metal around it to a high temperature. The sensor should catch fire and produce a small yellow flame. Allow it to continue burning until step 6 is complete.
6) Gently twist the sensor back and forth as you pull the sensor out of its bore. The melted plastic will act as a lubricant.
7) Extinguish any flames.
You should coat the new sensor with silicone dielectric (tune-up) grease before installing it. Always verify that you have adequate ventilation before working with fire.
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