I can't stand dealerships, independent shops only if needed, I had a 97 dakota that would do like this, had towed from i24 to a 24 shop they didn't know and wanted me to do full new ecu and several parts at $2,800 and I said no, I drove it to a dealership (strange needing a ecu when I drove it away) went to a dealership (not many options on short notice and needed asap) dealers was saying about the same but added more to the list and price, made some phone calls and went to auto zone and a guy there said he has had that happen and to change the primary coil wire, which I did and Abra cadabra problem solved.