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First mod of 2021: 3-cylinder Miata!
Well, I started it up to pull it out of the garage, and it only ran on 3-cylinders for about the first 45 seconds or so.
It was totally fine after the second start.
I was able to ID the problem cyl by touching the head near the exhaust ports looking for residual combustion heat, so I know which spark plug/wire/coil to investigate.
In previous years there was sometimes a brief miss on one cyl on cold starts, but never this bad. That one cyl wasn't firing at all!
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