Question about 1990 Honda Prelude

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Rough idle(200-300RPM)off idle runs great no white smoke

My 90 Prelude is automatic, carburated(dual Webers). It runs great but idles(more like stumbles)at 2/300 Rpm. Any thoughts? No white smoke. Recently got check engine light, accompanied by flashing S3 on shift indicator. Idle problem existed before light came on

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Have you changed your fast idle valve or air idel control valve I would change the air idle valve because it is the one with an electric sensor.

Posted on May 22, 2009

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