Originally Posted by Pilot Paul

I have just had the Cat's replaced on my car. Recently when the car is at the traffic lights or stopped in traffic the engine just cuts out and can't be started. After about 20 minutes it will always start then run normally until a day or so later it will do it again. Can anyone please advise what it could be ? Does anyone know of a garage that will look at the car near Guildford Surrey UK. Many thanks.