I had a similar issue with my MPFI zen,..it turned out to be a clogged oil strainer in the sump.
It so happened that the oil sump has taken a hit during one of my mountain expeditions (Ranikhet). There was some sludge which along with the dented sump was clogging the oil strainer not alowing oil to move freely. Got the sump & strainer replaced the problem got rectified. |