ICV is fitted under the inklet manifold and would be first point of call for an idle problem, other than that check the PBV valve which is on the front of the engine under the exhaust manifold, its on the right hand side as you look, bit of rubber with a tube going round the back. that oftens goes and is an easy fix

other than that get a diagnostics check done at fords as you could replace everything before you find the problem and sepnd far more than is needed to cure the prob