Misfire code says cylinder 1?

Tiny
ANTHONY BUGBEE
  • MEMBER
  • 2007 CHEVROLET AVALANCHE
  • 5.3L
  • V8
  • 4WD
  • 128 MILES
The code says cylinder 1 but it acts like if you took a wire off, shifts hard, and studders.
Monday, December 4th, 2023 AT 12:20 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,690 POSTS
So, a misfire can be the spark plug, ignition coil/wire, a fuel injector or low compression. Let's remove the spark plug first for inspection, this guide can help, and I have included instructions in the images below that will help you on your car:

https://www.2carpros.com/articles/how-to-change-spark-plugs

This guide can help as well:

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Please upload an image of the spark plug end so I can see it. Check out the images (below). Please let us know what happens.

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Monday, December 4th, 2023 AT 3:23 PM

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