Hi there, Over the last few weeks I've been getting what can only be described as a 'Vacuum' type noise when starting up. This only happens a couple of times a day, usually when the car has been left for 4-5 hours. The odd thing is that it doesn't always do it on a morning, but nearly always does when I drive home for lunch and then again after work. It's quite a loud noise... like someone is literally standing next to the car with a vacuum, lol. If I leave the car running on the spot once started, the noise will continue for about 2 minutes. Although, if I drive away and give it a few high revs then the noise goes after about 5-10 seconds. Does anybody know what this is, as it's starting to bug a bit now? Cheers in advance guys!