Been shutting off while driving. It mostly does it while you are idling down?

Tiny
JAMESANDJEN1013
  • MEMBER
  • 1996 CHEVROLET LUMINA
My 96 chevy lumina has been shutting off while driving. It mostly does it while you are idling down and then accelerating(while turning or coming to a stop). We took it to a mechanic. They cleaned out the EGR valve and now they have no idea what it could be.
Wednesday, April 16th, 2008 AT 11:44 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

This could be due to a faulty crankshaft position sensor.
The crank sensor sends the information of engine oration to the ECM.
Over time with heat and vibration for the engine the sensor can lose its internal calibration. This will cause it to send faulty information to the ECM. Which can trigger an engine to shut down.
It can happen at any random time.
This may or may not turn on the check engine light.

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

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.
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Saturday, January 29th, 2022 AT 6:16 PM

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