my 2001 kia sportage has been in the shop for 3 weeks now. and my mechanic is baffled..the car goe 20 mph up hill (if your lucky) when peddle is to the floor. we live on a hill and when we back up and put it in drive we dont move. we have replaced the fuel fiter, all four fuel injectors, the mass air sensor, the cat is not clogged, the timing belt is just fine. all tests they run says this car should be running like a locomotive and is not. any suggestions would be great.
thanks