4000d miss when hot

All been running the 4000d everyday since
getting it back together. It sounds quite
normal until it gets to operating
temperature, then it sounds like it's
missing. I went through and readjusted lash
to be sure it wasn't tight. Injectors were
checked before putting it back together.
I've put MMO is fuel and oil since it sat up
for a good while before I got it. I'm
hoping I can get the disk behind it this
weekend and make it grunt some. Do you guys
think it will straighten up as I work it?
Do you think it could be the pump? It's a
CAV on the 3 cylinder 4000. I'm torn
between keeping and selling it but want it
running well either way. Thanks in advance.
 

Get that disc behind it and load it up, if it still misses or gets worst under load check fuel flow to the pump.
If fuel flow is ok the inj pump needs to be tested and repaired.
 

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