The engine lights come on, then the car starts chugging and shuddering and sounds and feels as if it will shut down. i am not able to accelerate. this is a serious safety risk in traffic, especially if driving on the interstate. the car will not move at anything over 20 mph, if it even accelerates at all. i usually end up coasting to the side of the road and shutting the engine down. i let it sit and turn it back on and it may or may not let me go again. *tr