stop.also takes a few min to start? i took it to a mechanic and they said my car runs great wtf? no it doesnt .. what should i do? also it takes awhile to start it evey morning but after that it will start all day long no problem... only breaks down every once n awhile..mech. said that if it isnt broke when i bring it in then he cant tell me whats wrong with it?? help me plz?