got another 2011 6.7 65,000 miles with a p228f fuel pressure regulator 99 exceeded learing limits too high.
Truck idles like it got a big cam. rel comp ok, power balance ok.
went through pinpoint tests M11: frp pressure and voltage within spec. KOEO
Actual : FRP a 339 psi
FRP v 0.33v
spec is 730 kp which equals 105 psi? right?
.30v
replace frp sensor. going to replace it and see what it does.
Anyone had this concern yet?