Question about 2004 Mitsubishi Eclipse

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2002 eclipse check engine light

Check engine light came on. I finally replaced the throttle body assembly which seemed to fix the issue. I let the car sit for about 10 days. I started it up and the engine light came back on. It now is missing on the cylinder under the turbo. What would cause it to start missing like that?

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Either a bad plug, dirty plug, bad plug wire, not quite broken wire, bad or going bad coil, dirty injector. I would reset it first and make sure it comes back. If it does I would check the aforementioned items first.

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