Re: 2014 focus rough idle
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Check for collapsed engine mount (the one under the coolant reservoir). You can tell if there is any rub marks between the bottom of the rubber and the top of the lower aluminium housing. if there's rub marks, its collapsed.
Has this vehicle had a clutch replaced? If so could also be that the clutch mounts to the flywheel have not been torqued up to the right torque and in the right sequence.
Also check spark plugs and coils.
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