My 2000 Contour 5spd, V6, has had 5 fuel new pumps between 35,000 and 45,000 miles. Ford has kept replacing them, but what gives ? They've found debris in the pump screen. One mechanic says it's dirt, one says it's not. He says it looks like gasket material, or something. They've cleaned the tank, but it keeps happening. The car starts stumbling, a brief sit by the side of the road can get the car running again for a short while. Eventually the car becomes undrivable until they put in a new fuel pump. Mileages between fuel pumps has ranged from 50 to 2,000 miles. I have changed gas stations with no effect. My Dodge diesel, sitting in the same driveway, has had no fuel contamination problems. Any insights would be greatly appreciated. Thanks.