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Thread: Idle vibration
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Old 10-06-2012, 01:43 PM   #20
paul21
Focus Enthusiast
 
Join Date: Jul 2011
Fan#: 87707
Location: Murfreesboro, TN
What I Drive: 2012 SEL Hatchback

Posts: 180
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If your car feels mostly smooth then random harder jerks at idle, you should reset the car computer by disconnecting the battery for ~30 minutes or something and letting the engine idle for 5 minutes when you start it back up.

If your idle is smooth but causes a lot of vibration in general, then it's the motor mounts.

12B37 increases idle RPM from 700 to 800.
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