Update from the weekend, had a spare o2 sensor, but for a/f meter, not the computer, part store can have it for mon, no good. So we run the hardship 15 min at 8 am, frost on the ground and this car will not turn, but able to do data log, send to my tuner, he doesn't see anything and everything runs good. 10am off to the races. We have two on sun, my sprint race and the enduro. First race is the sprint, start on the pole for ITA, 9 cars in class, 13th overall, 45 in the field, one BMW, one escort gt and 7 miatas. Short of it, Focus kick butt, my first win in 7 years and I finished 9th overall, passed an ITR Mustang. Set a consistent lap time 2 sec better than last year. Great start to the day. Second race was the enduro, 8 cars in ITA, fiero 6 cyl on the pole, we are 2nd. 6 laps in I pass ten cars to catch up, pass the fiero, go to first place, pass the car to my co-driver. Lose the lead to the fiero in the pits, and finish 2nd. My co-drive did great, I need to give him a bigger lead, but a great weekend. So what was the cause of the screwed up fuel delivery, we believe at this point it was a faulty inertia switch, a 37$ part we have chased for almost one year. Time will tell, but part removed, two perfect runs, a/f was 12.3-13.2 at wot at 6k in 5th gear, fuel pressure 40 at wot water 195, oil 200 and oil pressure at 60. The car drove on to the trailer under its own power and two trophies came home, Go Focus. Thanks to everyone who has chimed in on this problem, your help eliminated everything till we got to this. Thanks again.