car rev's on it's own at startup.

[ben g]

Almost like some sort of anti stall thing.

 

[Bing]

This is different to the revs simply sitting high. as others have said, try and pull away (my drive is on a hill) and you get quick revs, like i'm pushing the throttle down quickly and back up

Seems normal anyway. Only reason I ask is a mate said my car sounded rough on start up.

Ah, ok. My bad