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Message: <blockquote data-quote="TwoStep" data-source="post: 2602388" data-attributes="member: 150046"><p>The high rpm is normal for a cold start, its meant to warm up the engine to a normal operating condition. Then once the computer see's this it adjust your idle air control valve to bring down your idle speed. The knocking could be several things... need more info. Does it do it all the time even when the car is warm or during the summer? You have to be specific here.</p></blockquote><p></p>