Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Dealer Changed plugs and wires and now runs rough?? › Reply To: Dealer Changed plugs and wires and now runs rough?? November 24, 2020 at 11:44 am #987173 Richard KirshyParticipant The on board diagnostics will show an issue providing the issue is out of the operational parameters.