Shaking while idiling?

Tiny
TCWASZ
  • MEMBER
  • 2005 SUBARU LEGACY
  • 73,000 MILES
I recently bought a used 2005 Subaru Legacy from a car dealer. In the last few weeks I have noticed it shaking while idiling at stop lights or in the driveway. It does not seem to do it in park, but all other gears. I switched from Premium gas to regular Unleaded, which seemed to help at first, but the problem has come back. Any ideas what this may be?
Monday, September 26th, 2011 AT 8:47 PM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
May just be a tune problem, replace plugs and check ignition leads, check for vacuum leaks and scan for any unresolved fault codes, ensure there is no oil in the spark plug wells as this can cause the leads to short out, if so replace rocker cover gaskets as well.
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Monday, September 26th, 2011 AT 8:53 PM

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