Check engine blinking light, cylinder #3 misfire?

2006 FORD EXPEDITION
270,000 MILES • 5.4L • V8 • 4WD • AUTOMATIC
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BEETLEPUNK21
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  • 124 POSTS
Hello,

I get a check engine blinking light (cylinder #3 misfire) when accelerating hard. Vehicle starts and runs fine. It only seems to happen when accelerating hard. What would be the process for diagnosing this issue? Thank you!
May 1, 2023 at 7:59 AM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
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This is common when the spark plugs or ignition coil is going out, I would replace them both.

Here is a video of the job being done so you can fix your truck:

https://youtu.be/E6oier7agkY

This guide may help as well:

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

Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.
May 1, 2023 at 11:16 AM
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BEETLEPUNK21
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  • 124 POSTS
Thank you! It ended up being the coil pack.
May 2, 2023 at 10:21 AM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
Thanks for letting us know, we are here to help, please use 2CarPros anytime.
May 3, 2023 at 10:47 AM