Help please with ford revving problem

deeds01, May 11, 5:55am
Hi,
have recently invested in a delightful 1994 telstar which is revving slightly at lights doesn't happen all the time and has never actually died just wondering if anyone may have an idea what is causing it
cheers

mugenb20b, May 11, 5:55am
Carb or efi!

deeds01, May 11, 6:05am
Sorry rather ignorant when it comes to cars ,whats an efi

mugenb20b, May 11, 6:10am
Electronic fuel injection.

deeds01, Feb 19, 6:02am
Replaced the spark plugs now goes like a rocket and no random revving
thanks for the input