I have a UK 1.8 Zetec 2000 model which as the car comes to a holt the engine
speed increases on its own up to around 2000rpm, only when the car comes to
a complete stand still will the revs return to normal. A few months back it
was much worse it would rise to about 2500rpm then at a stand still stall or
almost stall. The ford dealer replaced a split pipe (not sure which one )
which seemed to cure it for a while.

Anybody know what could be causing this & an easy quick diy fix to save me
the hassle of taking the car in to the dealer?

Thanks in advance

John.