Engine cranks, but there is no spark?

Tiny
DOMINICK VARGO
  • MEMBER
  • 1992 BUICK REGAL
  • 3.1L
  • V6
  • 2WD
  • AUTOMATIC
  • 26,000 MILES
Car is not getting spark ran fine one day came back out the next no spark but cranks.
Saturday, May 27th, 2023 AT 1:32 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

Chances are it is related to the crankshaft position sensor. When they fail, the vehicle will lose spark to the plugs.

Take a look at this link:

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

Also, have you checked to see if there are diagnostic trouble codes stored? This vehicle has an OBD1 system and doesn't require a scanner. All you need is a short jumper wire or even a paper clip. Try this and let me know if any codes are stored.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

I attached a pic below showing the crankshaft position sensor location. If you have no spark, this is my first suspect.

Let me know what you find,

Joe

See pic below.
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Sunday, May 28th, 2023 AT 12:30 AM

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