Truck starts and then sometimes it stalls while running?

Tiny
SUEMAR
  • MEMBER
  • 1999 DODGE RAM
  • 89,000 MILES
Ok I been having this problem for the last year the truck starts and then sometimes it dies while running. The check engine light was on and we got it checked said it was a bad speed sensor so we changed it. Now it doesnt have a check engine light on but every once in a while it dies and we have to wait like 5 min to restart and it starts up fine. Could it be a bad ecm?
Monday, March 21st, 2011 AT 2:12 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Hi,

What you described sounds like a faulty crankshaft position sensor. When they start to fail, they are adversely affected by heat. Once they cool a bit, they work again.

Do me a favor. Take a look through this link and let me know if it mirrors what you experience:

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

If you feel that could be the issue, check to see if the ignition spark to the spark plugs is present. If it isn't, suspect the sensor.

Here is a link that explains how to test for spark:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

If you decide to replace the sensor, here is a link that explains in general how it's done:

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

If you look at the attachments below, they provide the directions specific to this vehicle.

I hope this helps. Let me know if you have other questions.

Take care,

Joe

See pics below.
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Saturday, July 23rd, 2022 AT 11:42 PM

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