Since the injectors were tested they have not been put back into the engine. All are marked so I know were they go back.

I use Ratella 15W40 oil with Lucas oil stabilized. Fram oil filter.

Right now all that I've done is pull the injectors, valve cover and radiator so I can get to things to check timing chain stretch. I can put it all back together in short order. I'll try installing the suspect lifter in another cylinder and see what happens.

How does one tell an update air pump form an original? I can't find any info doing a search.