I have a 2003 sonata, I have taken it in twice for the same thing. While I drive the car it will lose "power" and is hard to accelerate, check engine light is on, when its in idle it vibrates a lot. Also when in idle sounds like the engine "knocks" car drives, but is very hard to accelerate. This happends off and on, now its happening more and more.
Tuesday, April 19th, 2011 AT 6:32 PM