Diesel Problems

I purchased a 2018 Ranger diesel at an auction. It was a Sunbelt rental and the Kohler diesel engine would not start. After working on it, adjusting valves and timing and checking compression , which looks good here is where I am at.

It will still not start on it's own. It will start with some starter fluild help....then once that burns off it will run off the fuel and idle. The idle is smooth and it sounds like it should. However it is blowing white smoke like crazy...smells like unburnt diesel. When I give it throttle it struggles and can't get up to speed. Compression tested fine. I am having a hard time finding someone that can test the injectors. I left it running for 30 minutes at an idle with some Seafoam.