Please help me. I`m new to the forum and have a major prob with my 1999 A4 1.8. Put a new battery on the other day, reset ignition, car started first time, revved to 1.5k then started banging and missfiring. Tried again, started ran ok `til next day then wouldn't start at all. Now starts, but scares the hell out of me, needs about 30secs, and 2 or 3 starts to run then runs fine. Anyone please?