Mechanics

SOMETIMES DOES NOT START IN THE MORNING

2000 Audi A6

Engine Mechanical problem
2000 Audi A6 6 cyl Two Wheel Drive Automatic 175000 miles

When the fuel tank is lass than half empty and possition of the car is horizontal, sometimes car does not start, there is no fuel in the fuel pipe comming from the fuel injector pump. However when the car is parked in the way that the rear of the car is lifted (higher that the frot side) there is no problem starting it. When is running the performance is great Also, if I don't start for more than couple of days gain I can not start.
No mechanic to whom I send the car till now is not able to tell me what is wronng with the car.
Any advice?
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Vetonpira
July 14, 2010.



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