Quote: If you had any fuel delivery problem the o2 would have gone dead lean. I dose not mater how many jets are different to other motors in comparison to yours your a/f didnt show that there was a problem. Just saying.
It might not be a bad idea to confirm the a/f readout is working correctly, though. Unfortunately that would probably mean installing it on another car for awhile?
Where is the lifter preload set? Any chance it could be lifter pump up causing it
