My other half has a 1.8 Zetec I have a Mk3 Tdi Golf. I'm posting a reply about my golf. I was having ECU problems and turbo boost related problems. In an attempt with my limited mechanical knowledge I simply disconnected the battery, counted to 10 and reconnected it.
Lo and behold problems sorted. I guess the ECU just need a reboot, so to speak.
I realise that my problem wasn't Ford related, but my solution might help solve yours.
Dave