My car has a rough idle!

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Car has had this problem from new! Now it has 8400 miles on it. Dealer changed transmission mounts, muffler bushings, and finally lowered the RPM from about 650 to 550. Vibration at idle seems better, but now there is a resonating sound through out the car! While stopping I also feel a rough idle when I am about to come to a full stop. Please advice.....

samu in Laguna Beach CA

Sep 8, 2015

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