Gary,
"There were some problems with some of the very first Ford V10's - a few self-destructed within several thousand miles."
Do you remember what the problem was with those new Ford V10's? I assume Ford only replaced the ones that had the problem and if so, for how long? I wonder how many of the old problem ones are still on the road that can self-destruct at any time! Let's hope that's not stretch12's problem!
BTW, do you remember me and my junky 1978 Class C with MPFI RV from the CompuServe forum? The MPFI barely passed the NV smog test last year so I tried lowering the fuel pressure (it was running too rich) and this year it passed with flying colors. It runs MUCH better with the MPFI and now idles perfect at all elevations unlike the old carb. But no noticeable improvement in MPG, still about 7.5 to 8.1 MPG in this 22 foot 11,500 lb RV. Even when it was running rich with the MPFI, it ran fine, a lot better than the old carb. I would not have known it was running rich if it wasn't for the smog test and the fact that my "check engine" light came on once with a code 45 (too rich @ O2 sensor). BTW, I put an O2 sensor on both the left and right exhaust, with a switch so I can use either one for the ECM.
-Don- In South San Francisco, CA