Question about 1995 GMC Jimmy

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Why is my 95 Jimmy's engine so loud when it is cold?

When i first start the Jimmy the first few minutes I drive the engine just roars. Then after a few min it quiets down. Is this normal?

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Clutch fan may be getting stuck. should freewheel when cold.

Posted on Jun 17, 2009

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Well if u will use a higher octane rate then this voice will be cancelled or try to check ur knock sensor if it works ( if ur vehicle has this sensor)

Posted on Jun 17, 2009

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