Melcosworth83

Hi all i have a mondeo st200 with a running problem ,the car is low miles
sometimes takes 2-3 attempts to start ,say 1 in maybe 5-8 times started
is lacking power ide say 20% maybe more down on power throughout the range .
sometimes revs up to 2500 rpm when you pull up at a junction
And finally has a flat spot high in the revs from 4th to 5th

the throttle comes in fine at 4000 rpm etc so imrc checked thats sound
and ticks over at 650-700 rpm too low ?

any help is great ,had a few of these cars and not had theses problems before