rubensousa

Hi can anyone please try an stear me in the right derrection with this one please i'm puzzled I have a 1998 2.3 galaxy for some reason its revs madly when i come to stop at a juction or lights when pressing the cluch upon slowin down for example. However if i then push the cluch me bein in nuetral when its revvin at 2100 revs or more they drop straight away although pressin the clutch at any time before this as they climp up to sometimes 3000 rpm does nothin .Any ideas apreachiated.