So, we had a nice day, and I decided to take the bus out for a test-drive. Well, a test-start, really. I figured that I should try and document what was going on, as I had read the last service paperwork (where they couldn’t replicate the problem after it got towed) more closely while cleaning up on the bus. The way it reads, they were looking for a hard start, but proved that the bus would repeatedly start when it was cold, and wouldn’t quit once running, which wasn’t the problem.
So, I videoed the cold start before a quick trip, and the attempt to start it hot that failed. (Caution, it’s a bit jumpy at parts, as I had a webcam that I was holding in my hand to take pictures at times.)
This really shows the difference, and how the engine started/didn’t and how it sounded, mostly for my own reference, and to possibly take into the dealership to show them.
But in putting it together and watching it after I had uploaded it, I noticed how low the oil pressure was (I had been looking at the temperature, not the oil pressure). While I had asked the mechanics at the dealership if the pressure was too low before, and they assured me that it was fine, this looks really low. And since one of the things about that sort of non-start is the IPR (Injector Pressure Regulator) failing, so the injectors don’t get enough oil to function, that could be it.
Unfortunately, there’s also a possibility that it’s the whole High Pressure Oil Pump, which isn’t thrilling. So, the next thing is to replace the IPR, and see what that does.