The car starts up perfectly in the morning and it idles fine while the gear shifter is still in park. its not until you put it into gear, either reverse or Drive the engine will begin to violently shutter when idling and there is a noticeable amount of power loss it will bug down while driving. Its not until the car fully warms up it will drive fine and the shuddering will go away completely. The plugs were changed recently as well. Its a 2001 Toyota Yaris.
My car has 200000 miles.
My car has an automatic transmission.
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