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619 Posts
In rare situations, I run into a rough rumble and vibration from the engine when rolling at about 22mph and 1200rpm. The car is in auto mode so I'm not sure what gear it's in. It never happens in manual mode or sport, and it always happens on a light throttle. Putting in more gas and backing off make it stop. Any ideas? I can't reproduce it on command, but it happens two or three times a week.
