Had a difficult varying common rail engine problem last year which just reading about Rolls Royce's remote control stations being further setup prompted my thoughts back to that engine and its associated problems.
It was a 14 litre engine running on LFO fitted with a Delphi diesel system for which we are the local Delphi Diesel Agent centre.
All fault codes read and eliminated, the next stage being scoping all components, sensors and actuators throught the engine and performing all the necessary tests for voltage, amperage and of course resistance etc.
One of the problems was the coding of the injectors to the system insomuch that the coding would alter after a period of several hours/days running causing the engine to go down on "Limpo " , ie reduced revs to just about maintain steerage way.
Now ( as not unusual ) the camshaft angle sensor together with the MAF meter measured up on top limits but was that enough to cause the problem? They could well be replaced and the original problem still be there.
After spending quite a few hours on this I decided to take advantage of Delphi's help system which we have to pay for yearly whether you use it or not.
Via our laptop plugged into the diagnostic plug on the engine Delphi took over all the diagnostics on the engine from about 250 miles away, remotely and via the Bluetooth system.
Although I could see quite clearly all the tests being conducted on the laptop I was reverted to just being a bystander, a watcher whilst cylinders were being cut out, compressions being measured electronically and for five hours every test bar one was carried out.
It was quite uncanny seeing the engine revving up and down on its own, injection timing being retarded and watching the resistance of one of the temp. gauges rising in order to register a higher reading and so on and so on for five hours.
Engine started knocking when the injection timing was advanced and the DPF was checked electronically and so on and so on.
No decision was to be forthcoming that day but next day it was announced that contamination of the fuel had brought about lubrication problems throught the system damaging injectors ( ceramic stacks ) HP pump, LP pump and that all would have to be changed.
Many thousands of pounds were spent in order to rectify the damage caused.
However the purpose of my writing this is that there was one test that the makers could not do and reading Rolls Royce Remote operating and rectification system I am wondering how they got over this?
So what is the one test that cannot be done remotely and has to be physically carried out on the engine?
Remembering The Good Old days, when Chiefs stood watches and all Torque settings were F.T.