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1990 Honda CRX idle problem after car warm's up it will run up to 2000rpm then back down to 800 rpm and repeats?
Wiki User
∙ 13y ago
It could be one of two things, dirty IACV (idle air control valve) or air in the cooling system. The IACV is the most likely culprit, you'll need to remove it and clean it really well with brake cleaner. It's located on the back of your throttle body.
Wiki User
∙ 13y ago
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