We purchased a 2006 Kia Amanti new, after a red light turned green the car failed to respond to the accelerator. I pressed down harder and the car shot off like a race car. This happens quite often, It has been in the repair shop many times, however, what is happening does not have a code, so nobody knows what to do for it! I am afraid to drive the vehicle. I just spoke with a Kia rep., she told me she can do nothing until the dealer finds the problem and without a code the dealer cannot find it. It's like a cat chasing its tail.