Idle oscillations are a systematic phenomenon (Mondeo 3)

If the battery has been disconnected, the on-board computer needs about eight kilometers to bring itself into "sports form" at this time. This time is required to restore all its data on the hard drive. If this procedure was unsuccessful, then perform the following steps.

ORDER OF EXECUTION

First, check the air hoses for cracks or loose areas. Do the swirl and throttle valves operate easily? Check all electrical connections for correct connection: they must be strong and clean. A more thorough and reliable check is only possible with a motor tester matched to the control unit.

(The original text is provided on an online resource: FORDBOOK.ru)