Isx cm871 white smoke

[Nitronic]

This is going to be a long one.
2007 Peterbilt Isx cm871

Truck started out with wiring issues.
No communication with dash, replaced oem harness from
Ecm to Firewall, repinned firewall inside cab, fixed dash, then truck started having sensor issues with low coolant, new tank new sensor, didn’t fix it, installed test ecm didn’t fix, put magnets on sensor didn’t fix, found new Harness was pinned Wrong from Peterbilt. Now that’s fixed. Less then a week later starts having white smoke issues. Heavy raw fuel, test doser injector. It tested bad, replaced it took out dpf had it tested it Failed, replaced
It. Still Have white smoke issues,
Start down the list of items in quickserve for symptoms, did injector leak test using the bolt
On block. Found cylinders 1-2-3-5-6 all Had compression leaking back through into fuel system. Replaced all 6 injectors, ran truck Up To temp after install ran great. At 195 degrees blew head gasket cylinder 1-2,
Pulled head found head cracked. Installed new head,

Truck now has new head, new injector, base timing set correctly, new ecm, new front fuel
Soldinode and new timing solid nose for first 3 cylinders. And a new ecm,
Still smokes white smoke and loses 1-2-3 cylinders over 150’degress and blows white smoke.
So I bought a used IFSM and installed it, still now change over 150 degrees it drops 1-2-3 and smokes white fuel Smoke directly out of manifold with exhaust unhooked and egr unhooked