rebuijds there are 10 ways, and 1 is good. so rebuilt means little. see my 100 steps
on my rebuild page. (honed cylinders,? new rings, , valves ground? )
looks like oil and carbon, so is burning oil and is rich, rich is stuck in limphome mode.
when i rebuild a motor, it gets a full compression test and leak down test using , yes
a leak down gauge. why do all that hard work, and not validate the work.>?
here is my journal on my rebuild. (but my bores were perfect)
How I rebuilt my block
on this engine after it runs, i make sure the EFI is holding closed loop.
if not that need to be corrected.
the oil can be seen by removed sparks, and ganger at the tips
or pull the exh man back and see if one jug has oil there.
simple stuff here.