hi i dont no if any one can help but when l leave my range rover sport s/c in idle the rev counter goes to 2000 revs the drops then keeps doin this till i put it back in drive feels like its going to cut out cheers

Did you get this sorted? Could be a throttle body needs cleaning or maybe a map sensor?

got it fixed few last month had the senser cleaned

Thanks for the update - glad it's all fixed