Engine cylinder 1 misfire?

Tiny
SKIP CROWDER
  • MEMBER
  • 2006 MAZDA 5
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 143,189 MILES
I replaced the plug, coil wire, same thing.
Saturday, January 27th, 2024 AT 3:02 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,940 POSTS
How does the engine seem to run? If rough, we should check the compression by following this guide. Also, can I ask how the spark plug looked when it was out on #1? If it was a dark or light color compared to the others, you may have a fuel injector going out. Either way here are the guides to help us get started also I have included images below to show you how to do the job.

https://www.2carpros.com/articles/how-to-test-engine-compression

and this guide can help as well:

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

also, a good guide to go over:

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

Check out the images (below). Please upload pictures or videos in your response to the problem so we can see what's going on.

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Saturday, January 27th, 2024 AT 10:50 AM

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