Crank no spark?

Tiny
DJPARRIS
  • MEMBER
  • 1996 ISUZU TROOPER
  • 4WD
  • AUTOMATIC
  • 170,000 MILES
I have the vehicle listed above that will crank but I am not getting any spark. Where should I start trouble shooting?
Sunday, February 5th, 2023 AT 11:41 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

Often times a loss of spark is due to a failed crankshaft position sensor. This sensor can fail and still not set a diagnostic trouble code.

If you have a live data scan tool, check to see if there is an RPM signal when cranking the engine. If there isn't, that is where I would start. See pic 1 below.

If you have no scanner but the vehicle has a tachometer, see if it moves a little while cranking the engine.

Do me a favor. take a look through this link and let me know if it mirrors what you are experiencing or have experienced:

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

Let me know. Also, the last two pics are the directions for replacing the sensor.

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

Take care,

Joe

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Sunday, February 5th, 2023 AT 4:48 PM

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