hi, i got a 2000 model and it has started doing this for a week. when the car sits a few hours or over night and i go to start it. it sputters and dies. it will do this 10 times unless i pump the accellerater when it cranks. it smells like it is rich when it does start. i have no check engine lights on and it has a new fuel filter. i am thinking that some of theh injectors are leaking down into the cylinder. what is this.