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ECU Rich Error code

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Old Jun 1, 2026 | 11:12 AM
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Icon5 ECU Rich Error code

I have a '99 Civic hatch with a stock D14Z2.
I have a constant check engine light, and the codes read back to a rich mixture.
Plus, there's a weird "power loss" under high rpm (doesn't matter which gear), it's losing power, and it feels like I took the foot off the gas pedal, even though I am still pressing the same as before.
Then I let go of the gas for a sec and press again, and the power comes back.
Now I really can't understand why. I know the injectors are injecting correctly.
I changed the fuel filter just in case, and I want to change the injectors to a new set, but I really can't find a set for the D14; it's all for the D16.

Does anyone know what's wrong?
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