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air idle control valve issue


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On my 97 civic, the AICV was replaced. It was fine for a few days and check engine light came on but it wasn't running that bad. Although i noticed it would sometimes downshift hard like the idle was staying too high when I would let off the gas. The code indicated AICV system. So shop replaced it again. Now it's been fine for about 4 days and CEL is on again and it's not running well at all. Kicking when it shifts and engine almost shaking. ( my daughter drives it away at college). Shop said if CEL comes on again it might be wiring to the AICV ?? I think they are missing something. Any ideas.?

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