Originally Posted by Popsy
Mmm, that's weird. Small leak on the fuel "chain" letting a bit of air in?

Hi, just following up:

Indeed the suction side of the fuel system wasn't completely air tight, I discovered small leaks on junctions. Temporary repairs stopped the jerking

Peugeot Partner 1.9 D, 5W40 C3, 245000 Km, running on WVO
Wife's Mitsubishi Outlander PHEV, dealers overfilled, 16000 Km