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My RS seems to have a rather low idle, it did have an air leak but i've sorted that. It seems worse when hot, goes down to about 500rpm instead of 6/700 when cold. Can i adjust this without undoing the good work jamsport did? Or is it to do with hot air and the K&N not being shielded at all?
try the idle speed control valve matey!i had a problem similar with an air leak and i changed that aswell and its fine now!there only about £40 i think from ford!