Hi all this is my first post and it's not a good one unfortunately. I was driving my A3 happily on my way to pick up some shopping and my engine light came on so pulled over and switched it off, i then started it again and the light was still on, it has ruff idle and a really loud hissing noise coming from under the fuel rail. The temp on the dash is fine but under the hood feel's very hot and the plastic engine cover was to hot to hold in hand and the fans kick in almost straight away. Any help would be great. Kind Regards, Neil.