Re: mis-firing mondeo.
Hi Fordtech, as promised, here's what happened. i took off the coilpack, and examined underneath, but it looked perfect.
as i still had the old coilpack, i decided to swap them anyway, as i had tried everything else! yes, you guessed, the car now runs perfectly! thanks for your input.
the way that the car behaved, only misfiring at idle with no load on the engine, or at low revs, is not how i would have expected a faulty coil to behave. you live and learn!