[Richard]

Thanks for getting back with us.

The internet says, bus conversion forums say, that it is likely one of two causes: air in the fuel, or bad injector harness.

If it’s me, since this whole thing started with a fuel filter change, and I am a believer in looking at the last thing you touched, I would want to ensure without any doubt that the engine was indeed primed before I pulled the bedroom floor and replaced the injector harness. Do you mind describing how the system was primed?

First thing I would do, is look at the exhaust pipe while cranking. If the engine is getting fuel, you should smell raw diesel or see white smoke out the exhaust.

Second thing, I would do is hold the emergency shutdown switch and try to crank.

Third thing, I would do is remove the injector harness connections from the DDEC, spray them with contact cleaner, and reconnect. The injector harness connections are on the left side of the DDEC as you face it.

I don’t know if ANY of that would help, but it’s easy to try before pulling the rear floor. Newell installed a hatch over the engine. Before giving the basics on removing that hatch, please tell us what is the floor plan. Rear bath? Rear closet? Can you post a pic, and we can go from there.