I need help and I need it fast. Hope someone can help me out here. I have a 1998 Buick Lesabre with the 3.8 series II. Car started out dying after about 20 miles. Restart it and it would go another 10, 5, and so on. Here'* what has been replaced to try and remedy the issue:Plugs, Wires, Ignition coils, ignition control module, MAF sensor, MAP sensor, EGR valve, IAC Valve, TPS, PCV, Fuel pressure regulator. After replacing all of these to no avail, I replaced the the fuel pump and filter. Now the car will run great on the highway with little to no trouble at all. My problem now is in town driving. Every time I stop the vehicle it stalls. When I get her started back up again(starting it in neutral) I have to throw it down in first to get anywhere and shift to get up to speed. When it does this dying it will blow out black smoke from the tail pipe and run like it has a miss. I'm getting no DTC of any sort and my live stream data does not indicate anything abnormal. My biggest problem is, I live outside the States in the Bahamas and finding an alternative means of transportation is out of the question. If anyone has any suggestions that would greatly be appreciated. I have leave this vehicle so my father will have something to drive when I return to Kansas and he is incapable of working on it. Thanks.