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Engine shake while idling

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Old 04-18-2008, 07:05 AM
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smw
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Default Engine shake while idling

I posted this on the 30v v6 page, but wanted a broader audience, so here it is:

I have a 2002 C5, and just recently while idling, I can feel the engine shake. Things seem to be okay while driving. The car has 64k miles. Anyone have some initial thoughts as to what the problem is? Sorry if this is a basic question, but I'm new to Audis and don't claim to be a great mechanic. I assume its something with the plugs or timing belt.

Any info would be appreciated.<ul><li><a href="https://forums.audiworld.com/30vv6/msgs/4199.phtml">https://forums.audiworld.com/30vv6/msgs/4199.phtml</a</li></ul>
Old 04-18-2008, 07:16 AM
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Default I've got the same problem ... do you have rough idle as well? ...

I'm going to try cleaning the throttle body, I've read a couple threads that point to that as being a possible problem.<ul><li><a href="https://www.audiworld.com/tech/eng109.shtml">https://www.audiworld.com/tech/eng109.shtml</a</li></ul>
Old 04-18-2008, 07:19 AM
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smw
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Default Re: I've got the same problem ... do you have rough idle as well? ...

The idle experiences periodic "heavy shakes", so its not a full time problem. I guess I could try to clean the throttle body and see if that helps.
Old 04-18-2008, 07:21 AM
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Look 1st at the coil packs, vacuum leaks, gasoline grade, etc.
Old 04-18-2008, 07:34 AM
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Default Check your motor mounts

They may have failed and causing excessing vibrations as well.

Mounts leak a dark purple fluid when they've gone bad. Easy to inspect on your next oil change.
Old 04-18-2008, 07:38 AM
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What is your idle rpm?
Old 04-18-2008, 07:58 AM
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Default Re: Check your motor mounts

Thanks. If so, what do you think the repair cost would be, ballpark $$?
Old 04-18-2008, 08:21 AM
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Default Not too bad, about 2-3hrs labor.

We sell the mounts for about $50each.
Old 04-18-2008, 09:24 AM
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Default What is your opinion on the RS4 mounts you sell?

Would I really notice that much of difference with a TIP?

Asking because when I had the timing belt service last month my indy said that one of my motor mounts had started to leak slightly and would be something to keep an eye on.

And I assume you would want to replace all of them at once right?
Old 04-18-2008, 09:33 AM
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Where are you located?


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