oil in the intake manifold? Is there an easy place to squirt it? A plug or something that can be pulled and a couple of teaspoons poured in?

Old diesel? I though diesel was pretty much a stable fuel? Surely it would at least try to burn? I'm getting nothing, zip, nada, zilch.

I should have brought the volt/ohm meter in today to check the glow plugs. Can they be checked while still in the car?