Only runs with crankshaft sensor unplugged

Tiny
ADAM PHILLIPS
  • MEMBER
  • 2002 DODGE DURANGO
  • 4.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 168,000 MILES
Five second delay on spark and voltage drop on single wire for crankshaft sensor and it only runs with crankshaft sensor unplugged.
Wednesday, April 24th, 2019 AT 8:51 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,640 POSTS
Welcome to 2CarPros.

Which wire has a voltage drop? Is this while cranking? There are three wires which go to the sensor. Pin 1 is sensor signal, 2 is the ground, three is a 5 volts signal to the sensor. Let me know which one is the issue.

I attached a pic of pin locations so you can tell me which one is the issue. Also, make sure the pins are not damaged, corroded, and there is no damage to them. Finally, you need to go back to the PCM and remove the connector to confirm corrosion there. Since the is power which is lost, chances are it is a connection issue.

Let me know.

Joe
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Thursday, April 25th, 2019 AT 6:12 PM

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