While stopped at a stop sign the engine shut off, it will crank but does not start?

CUTIEBUTT12

MEMBER
1996 CHEVROLET CHEYENNE
5.7L
2WD
AUTOMATIC
144,000 MILES

Stopped at a stop sign and engine immediately cut off. Turns over but will not start. Connected my OBD tool and it mentioned 02 sensor, spark plug, and crankshaft position sensor when I tested the crankshaft position sensor it was basically no good but I don't quite understand how because it never got hit so it should have been fine, but I went and got another because it was still under warranty. But before I changed it, it sounded like it wanted to start, when I changed it there was no fire.

Friday, March 1st, 2024 AT 2:58 AM

1 Reply

JACOBANDNICKOLAS

MECHANIC
110,052 POSTS

Hi,

Chances are it is the sensor. In most cases, a crank no start condition is the result of either an ignition-related component (crank sensor, spark plugs in this case) or it is a fuel-related issue.

The first thing I would do if I had the vehicle would be to simply see if it starts using starting fluid. If it starts and then stalls, we know it is a fuel-related issue. If there is no change, then suspect ignition spark at the plugs is lost likely due to the sensor.

Check these things and let me know what you find. Here is a link that explains how to test for spark:

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

Also, take a look through this link and let me know if you feel it mirrors what you have experienced:

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

Let me know what you find or if you have other questions.

Take care,

Joe

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Friday, March 1st, 2024 AT 8:21 PM