I work for a place that uses Thomas EFs to transport people with disabilities. (part time) - they have Cummins ISB 07 engines. One bus has had 3 ECUs in its life time. its a 2008 with 130k on it. The other is a 2010 and has 110k on it and has two ECUs. Is anyone else seeing this w/ these buses?
Ours were repeatedly losing their programming. One of our best techs I asked about it said it could have been any of a number of things. He specifically mentioned jumping the bus off with 24V or running the batteries down with the ignition on.
We've done three of that ECM on '08-'09 BB A3FEs, and one on an '02 Ford F650. All our Visions are ISB10 or propane, and our C2s are all propane, so I can't comment there.
"Growing old is mandatory. Growing up is optional."