My truck has a similiar problem. It's a 99 Dodge Ram sport with 5.9L. When it is cold it wont stay running without my foot on the gas. Sometimes wont start like the battery is dead or the starter is dead but they are fine. After the truck warms up it ran fine till recently. Now yesterday I drove it for forty minutes and then after parking it and restarting immediately it died. The truck is giving no trouble codes at all. The battery and alternator are fine (dodge said that if the battery fell below below 9v it cold cause idle problems). One of the cylinders is misfiring. The coil has been changed to the new way already. Any help would be great.