[TimT]

One thing that really confirmed for me that fresh strong batteries are required for the modern Diesels is that I installed a monitor... scangauge I am able to monitor the battery volts, and the voltage the fuel injector control module is outputting..

The injectors work @ 48V on my truck...

I noticed that if my 5 y/o bateries sat for a few days... they would dwell down to 12.1 volts from 12.8.. sometimes less than 12..

I would cycle the glow plugs once or twice... then crank.... cranking volts would quickly drop to 7-8 volts... and the control module voltage would drop in to the 35-38 volt range...

The injectors wont even fire then... so no start...

New batteries and it happy happy joy joy..