Truck has no spark?

Tiny
JESTME
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • 4.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
Truck has no spark and when I put a fuel pressure test it goes to 60 but comes down to 0 right away.
Tuesday, April 9th, 2019 AT 8:36 PM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

This could be a problem with your vehicle's Crankshaft Position Sensor (CKP). Your vehicle's Power-train Control Module or "computer" uses the information of the CKP to determine the speed of the crankshaft and by this the rpm's of the engine. Without this information your vehicle will not start. I have included a couple of diagrams in the diagrams down below and a few links below:

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

Please go through these guides and get back to us with what you are able to find out please.

Thanks,
Alex
2CarPros
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Wednesday, September 2nd, 2020 AT 1:12 PM

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