This question does not pertain to a Contour, but I figure that somebody can still answer my question as I may eventually have this problem in a Contour. My neighbor has a Mazda truck. It has little power at high rpms, esp. at full throttle. It seems to lurch and jump, perhaps like its starving for fuel. I checked fuel filter (its up in the engine compartment instead of at tank) and all I could see was it was about 1/3 full. I changed it out with a brand new one. After running it for a while the level is about the same, whereas when I owned the truck it was always full. Does this indicate a bad fuel pump, or a fuel pump this is clogged? I should mention that the truck is not fuel injected, but carbeurated. (did I spell that right?) I know it could be another problem, but do you thinks its worth having the fuel pump replaced? Its about 38.00 for the certified Mazda part but since I am not experienced with fuel pumps I would be afraid to attempt repairs myself so labor would run the cost higher than my neighbor would prefer. Any suggestions, comments, insights? Thanks to all who reply.