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Check all vacuum hoses. One must have been unplugged or broken by the person replacing plugs. This has all the symptoms of a vacuum leak. If you don't find any vacuum lines off or leaking, check the firing order to make sure the mechanic put the wires on the correct plugs. I don't know what car or engine you have or I would give you the firing order.

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โˆ™ 2004-05-27 10:26:32
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Q: What could be wrong if the engine has a rough idle loses power when going up a slight incline and guzzles gas after having the spark plugs and oil changed?
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