I have a 2003 chev Malibu and am having serious problems with it and am hoping that if anybody reads this that they maybe able to steer me right. For the last 6 to 8 months my car has loss pretty well all of it's passing power. To pull out and try to pass another vehicle at 60 to 70 km/h my car will rev up to 4 to 5 rmp but the car isn't actually picking up any speed so i have to pull back in. The check engine light is coming on and off. I've had the car into the chev dealership three times. Been told it was the cadillac converter and had that replaced and didn't solve the problem. They also replaced the map air flow sensor and cleaned the internal computer and still nothing was coming up on their main computer system. Fuel tank was dropped and pump was tested and also the screen was checked. If anybody has any ideas or has experienced this could you please point me in the right direction. thanks koko