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Have you tried unplugging the computer back-up fuse, replacing it, start it, let it idle for 10 minutes. This retrains the SI to air-fuel mix, which will calm your idle. After that, needing further idle adjustment, RTFM the Haynes manual.

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โˆ™ 2015-07-15 19:19:34
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Q: How do you lower idle speed on 1987 Honda Civic Hatchback SI?
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