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I have 91 chevy k1500, It does this, Sometimes it will idle a few minutes, then jump to high idle and check engine light comes on, And sometimes its as soon as i start the engine... I was told it was a vacum leak, But im no mechanic

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โˆ™ 2012-02-18 04:43:41
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Q: Why 1991 Chevy silverado idles for a while then jumps to high idle?
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