I have a 873 bobcat with a Dietz Diesel that won't start. Will start and run with ether (yes I know that's not acceptable). Soon as you shut off.back to same issue. It's been in a shop for awhile fuel pressure, compression and other systems have been noted as okay. Not being a Dietz expert and the tech is master bobcat certified and had conversations with Bobcat to no solution. Could it be glow plug system? Any idea of what to check next? Thanks Keven