Car related help needed!
Have an astra which has been playing up for last few days - neighbour came and looked at weekend and said it seemed like it was coked up and advised I stuck a tin of power boost through it. Did this and car chucked out a load of black stuff from exhaust but car still not right. Am going to take it to local garage this afternoon but am worried about cost - will they have to tell me how much before they do anything and if it is 'coked' up then how much roughly will this cost to fix? Any ideas?