1997 Audi A6

Engine problem
1997 Audi A6 6 cyl All Wheel Drive Automatic 103000 miles

My 97 Audi won't start when I gas up. It starts hard. If I keep the gas throttled and get it in gear I literly have to go about 6" and it smoothes out and runs perfect. Will start every time--until I gas up again. Engine light is on. It says I have a vacuum leak--took it to garage, had vacuum lines replaced, new gas cap, wires etc It still won't start after gasing
January 14, 2008.

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