Funny Idle

[Dirrt]

As topic states, happened last night on the way to pick up some more G40 BBS wheels and as I was driving along this skinny country road, I pulled in to let a car through... As I pulled in and stopped she started to rev and was then idling at like 2K and sat there

My heart sank
I revved her very lightly and gently (as some would to warm a car) and let off and nothing changed
I did the same again and she returned to normal

Why would she have done this/what would have coursed her to do that?

[hayesey]

it could be a vacuum leak.  Check that all the thin vacuum pipes are connected and not split.  And that the throttle cable isn't sticking and holding the throttle open slightly.

[sohailG40]

yeh check your throtlle cable coz mine used to do that a lot and i found out it was the throtle cable which was sticking

[Dirrt]

I thought it might be to do with something sticking, ok thanks for the replies 

[sohailG40]

did you have any luck m8