Here's what's transpired so far...
'79 300D NA
Was running about a month ago.
Stopped running and sat for a few weeeks.
Compression is good on four of five (#3 is low but always has been).
Injectors cleaned and washers replaced.
New return hoses.
Old fuel drained and refilled with fresh diesel and treatment.
Inline and primary fuel filters replaced.
Fuel lines purged of air (old screw type pump, weeps a little when using but otherwise seems OK, considering getting a new type).
Tested glo-plugs, getting power and heat on pre-glow but not hearing the relay (will test tonite).
After many attempts she fired up on a jar of LubroMoly and ran briefly with 50% accelerator, but wouldn't stay running.

HELP - I'm sure I'm just missing something obvious, but it won't start and is getting frustrating. It's been cold and foggy lately, so that isn't helping either.

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'79 300D "Jaeger"
'61 VW Baja "Frosch"
'92 Honda Shadow 600
'80 Honda 185 (cafe project)