Ok so here's the results (in case anyone else has this problem and wishes to know)
Even thought there is a calibration requirement upon powering up (and I do the calibration... turn wheel all the way to the left and hit the button, turn wheel all the way to the right and hit the button, stop on gas all the way, step on brake all the way), that didn't do anything.
HOWEVER, when I went into the menu and went to calibration and did *exactly* the same thing, it fixed the problem. The flames came back from a double pump and I am now able to go over 100 mph.
Woo hoo!! Thanks everyone for your great help and advice.
Kim