2001 Savana van 3500 6.5 Auto. Van has 280k with no history but is was business owned and seems pretty well maintained. Van started with intermittent stall but would start back everytime. Now it's running rough and lots of white smoke. The glow plugs are working and the loft pump is working but the pressure at the valve on engine seems low. I can push in valve and it.will just run out, no pressure seems like. Also has no engine codes at all. Customer says when the stalling started it seemed worse on rainy days.

 

Is the van turbocharged I assume it is sounds like it's not burning all the fuel could be vacuum pump or a line I'm suprised it has no codes at all and intermittent stalls and hard starts could be PMD related what is the age and location of the PMD? If it's still attached to the IP it's time for a new one and do a relocate of the PMD.