[Kev Audi A4]

Hi,

I recently had my car parked up at Gatwick for 2 weeks whilst i sunned my self in the sun, upon my return and after checking the car everythin seemed fine, Then half hour up the M25 the car started to splutter, and lose power.

Then when i am stationary and the car ideling it seems to be running rough, and sort of vibrating alot,

Anyway, this lasted for about 2 hours. had no choice needed to get home, i have left it a few days now, thinking that the run might sort it out but it has seemed to get worse, could it be water getting in somewhere? There is a little bit of water/petrol coming out of the exhaust when i let it idle on the drive.

Its booked in tomorrow but i dont wanna go spending huge amounts for them to investergate if i can give them an idea what it is, they might just sort it out for me, or i might even be able to sort it myself

Thanks in advance