how do i stop my ford puma over revving?

i have a ford puma that when you take your foot of the accelerator to change gear or slow down, it takes ages for the revs to fall down thus over revving occurs. any help would be appreciated as this is costing a fortune to run.
karl walford, December 2006


done
its the idiling valve, mine did the same, cost tenner at garage to fix

rushton, December 2006
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