Truck surged at stoplight drove to parking lot fine, idled normal and I shut it down. Restarted normally and will die when shifted into gear. Revving doesn't help. Cycled key- Po 1492 ( amb/batt temp volt too high) Po 1693 (compainion code) P done no ECM code went to mileage. Why 1693 then? I unhooked the piggyback wiring for Big Hoss and returned to stock no help. Towed to Dodge. Suggestions?