Only runs with crankshaft sensor unplugged

2002 DODGE DURANGO
168,000 MILES • 4.7L • V8 • 4WD • AUTOMATIC
Avatar
ADAM PHILLIPS
  • MEMBER
  • 1 POST
Five second delay on spark and voltage drop on single wire for crankshaft sensor and it only runs with crankshaft sensor unplugged.
Apr 24, 2019 at 8:51 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
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
Apr 25, 2019 at 6:12 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.