Engine keeps turning off?

Tiny
MEDELLIN81
  • MEMBER
  • 1996 SATURN SL1
Keeps turning off, I put new spark plugs, new wires, new idle control sensor, new throttle control valve.
Monday, February 8th, 2010 AT 10:04 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

If you are experience engine shutting off at random times (driving or idling), it could be due to a faulty crankshaft position sensor.

Over time the heat and vibration from the engine can make the sensor loose its internal calibration. When a crank sensor goes bad it will send incorrect data to the ECM. That can trigger a engine shut off.
The Crankshaft Position Sensor is located on the back of the engine block, below intake manifold (see diagram).
Check the sensor and make sure the connector is secure and free of any corrosion. You can also check the sensor for internal resistance. It should have 700-900 ohms resistance.

Here are some helpful articles:

https://www.2carpros.com/articles/how-a-crank-shaft-angle-sensor-works
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 of any questions.
Thank you.
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Wednesday, September 22nd, 2021 AT 9:34 PM

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