Flickering CEL 275ISB
Under high throttle / low RPM, high throttle / high RPM, high load conditions, I am getting a CEL that mostly flickers, but sometimes is steady. When I was starting from a stop light, it flickered multiple times on our most recent trip, and on same trip, when I was in the mountains climbing a grade, it was steady and nearly didn't make it up the mountain. Crested at 25mph decreasing.... I'm not interested in driving the coach except to test out solutions, and have neither time / money to drop it at garage.
During the past year, the engine was replaced along with the VP44 as well as the lift pump (purchased it with known bad engine).
1) The coach is factory standard except for the lift pump (FASS). What diagnostic / preventative / proactive things would you install / look at that may solve the CEL but also prevent future problems (if it doesn't fix CEL).
2) I intend to change all three fuel filters (the water sep near radiator, the fuel filter mounted to engine, and the frame rail filter).
3) I have checked coolant level in surge tank and it is good.
4) No idea what other "sensors" trigger the CEL. Anyone have a list of trigger conditions?
5)I cannot get the code to "hard set" on, so I cannot read it with my diagnostic tool ($100 HD truck reader from amazon). I have heard that VMS will log it if it happens while VMS connected. Anyone know positively that Bluefire will do the same?
1999 Fleetwood Bounder 39Z 145,000miles
5.9L Cummins ISB 24V