I have a 2002 dodge caravan se 3.3 engine.My car started sputtering and hesitating a few days ago. When i come to a light it shakes and shuts off. I restart without any issue,and the morning start up is fine. I took it to mechanic he says the codes show bad egr and map sensor, but my model doesnt have an egr valve. So we replaced the map sensor, car still doing same thing. Any suggestions??