Hello.

Thank you for your reply. No, this is an old model, so there's no data terminal at all. I am suspecting the RPM board too, but
I really don't know. The glow plug circuit is working correctly according to the manuals. Sometime the pump would prime fuel correctly
so that the glow circuit would switch on, but that's where all things stops. Other times, the pump would just barely turn over and
then just stop there without going any further. It seems like the RPM sensor board doesn't read the compressor's rpm correctly or
consistently. The manual says that if the compressor speed dropped below a specific RPM, the start sequence will stop. The "start" abort process
begins with the pump stop priming the fuel system to get rid of bubbles in the line, then the glow plug circuit would stop after that. So, because
the pump sometimes worked correctly up to the point where the glow switch on, then fails, makes me think it is the RPM sensor board failing
intermittently. This engine has very low time. Maybe 3 hours altogether.