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Q: My 2004 passat has is shaking while idled. What can cause this? on 2004 Volkswagen Passat

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Occurs every time now. We know that we need to change 2 spark plugs. There is a very small leak in transmission we are told.
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Hello, "shaking" can be caused by engine misfire, which could be related to needing to replace spark plugs or secondary ignition items, such as ignition wires. The wires could be breaking down -- they are insulated by rubber which can dry rot over the years, causing spark to escape also. This is just a guess; even a base engine issue can cause trouble with a rough idle. A proper diagnosis should be performed to get to the root of the problem. Good luck.
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