1139 1141 1142 1143 1144 1145 faults

[twinturbo]

Had the same codes from what I can tell from there invoice before and after the new harnesses. Ran 150 miles the last time I cleared the codes last week before coming back up. 525 hp, 31-32 psi boost, maintenance free CC filter, very little blowby. I have not done a leak-down test. We can do that next time he stops by.

Looking back at the last data log that I have the rail pressure went from 2000 bar to 1000 bar in about 14 seconds coasting to a stop in gear with no fuel flow. I am guessing that is going to be my problem. Other trucks I data logged will drop either very little once it settles to a pressure to maybe dropping half as much in the same time period.

Troubling thing is Cummins diagnostics doesn't really have you do much of anything for tests with these multiple code other than check return pressure.

Just talked to tech who worked on this. He did also check return flow with rail pressure jacked up doing a pump test. He said it only returned apx 30 ml of fuel and had almost 0 return pressure. He did not do a pressure drop test.