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Think of the last time that you had a tune up done. This sounds like a mis-fire problem. Try replacing your spark plugs, preferably not Platinum..because you cannot gap them, and have to use their gap. Bad experience with them. Replace spark plugs, wires, maybe distributor cap & rotor. If this doesn't fix the problem, listen for any vaccuum leaks, or check your PCV valve, and PCV valve hose. Sometimes they get pinched, and crack.. and doesn't take the fumes out of the block to get reburned. Could be lacking oxygen, check your air filter as well. What kind of vehicle (cylinders) is it? And does it happen when it's cold, hot, or both?

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โˆ™ 2006-09-11 07:27:38
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Q: What could cause a motor to shake violently during idol?
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