Eurocharged ECU tune with the Speedriven TCU tune. I think it all has to do with speed. I was limited to between 50 & 60 MPH for the trip that inluded a border crossing that took 20 minutes of bumper to bumper and another hold-up in Grand Bend for 2 kms of B to B traffic due to a "Cell towers hurt our children" protest.
Also had the air on for about 1/3 the trip.