So it turns out I might be an idiot and I'm not sure that I've fixed.. I'm pretty sure though but either way I'm embarrassed to admit what I found out today.
I pulled the truck into the garage to change the oil and as soon as I took the drain plug out I knew something wasn't right as what was trying to drip out was not the thickness of diesel oil. I got the truck between warm and hot before changing the oil and I added a little mmo when all of this started happening but not this much.
After waiting forever for the poor truck to drain whatever was in the engine out of it, I almost had to get another bucket. Not counting what was in the filter, I filled a 4 gallon white bucket to the brim with oil and what is gonna end up being diesel fuel that was in the crankcase.
I panicked after seeing the runny whatever the heck was in my engine and started to my radiator cap only to find that it is totally full just like it was a week ago when I bought the truck as is the overflow. Nothing has moved there.
Then I got to thinking, when the previous owner replaced the lift pump did he change the oil? I thought he told me that he did, but I also have two receipts for two lift pumps with all of the trucks paperwork from this year so did one fail and the changed the oil and then did it again due to the lower fuel pressure but not check the oil?
I also crapped out on the highway with the truck 3 days after buying it and had posted in the 911 thread because I couldn't get it started back up and had to be towed. It turned out that my water separator on the fender was clogged up but at the same time who is to say that that lift pump didn't slowly crap itself since we bought the truck?
Either way, I changed the oil today with regular 15w40 delo that my other IDI loves and put a new filter on it and drove it three laps around my "test route" and it did not do any of the sputtering trying to run away anything once. Then I drove it ten miles round trip after a half hour of driving my laps to top off what at this point is a fuel tank with so much power serve fuel additive that I'm back to trying to thin it out some and it didn't do anything weird. Even took it on the highway back home up a hill at pretty high rpm and nothing.
When we got back, the big thing I didn't think about that further has me hoped that this fixed it was the idle was magically so smooth all of the sudden but I didn't do a single thing outside of change the oil since the previous day of messing with it. Dad was even the one who mentioned it and he usually doesn't notice those types of things but the idle felt awesome.
I guess when you have upwards of over a gallon and a half of "something" in the crank case and it's not just pure oil, it would be pretty easy for one of these engines at high rpms or when lugging up hills to start vacuuming whatever it is either through the cdr or just straight up through the valves given the higher levels of the fluid and how thin it was and try to run on it. Which would also explain the bluish smoke which is also totally gone. Heck it was probably burning some of it at idle right past the cylinder walls.
I'm going to gradually take it on longer adventures and see if it ever does anything weird, but I think I made an embarrassing rookie mistake whether the lift pump dying on me on the road leaked into the case or whether the previous owner didn't check the oil after he put a new lift pump on it and I didn't check the oil while we were test driving it. I think I did, but couldn't swear to it. Hopefully my pump seal isn't leaking into the oil or an injector isn't leaking non stop, but it doesn't smoke at idle hot now at all so I think that closes the book on a leaking injector. Just gotta monitor the oil and make sure it isn't filling back up from the pump seal. I might still get a pump and injectors from mel just because I'm sure one of my idi's are going to need those parts eventually and my fiancé already told me to buy the stuff so the truck isn't junk... she doesn't need to know whether the stuff was installed on the truck or not lol...