All good suggestions. Oil is Rotella 5w-40 synthetic, recently changed. Battery indicates it was new in June 2014. I've been putting the charger on it to make sure it's fully charging. It's possible it's not all that great, because when I bought it I had to replace the alternator, so I suspect the PO had left it discharged for a while and just charged it for the sale. It seems to be cranking fast enough.

It does have a block heater and I tried that for a couple hours last night with no difference. I'll try it overnight tonight. I'm not 100% sure it works. Previously, I was able to easily start without the block heater at 20F.

It's possible there is air in the system, but not sure how it would have gotten in there. I did try pumping the hand primer some, with no effect. If there's anything else I should try to bleed the fuel system, let me know.

What has me flummoxed is that it started so well before the glow plug issue. It seems something else must have gone wrong but I'm not sure what.

Thanks for the help.

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-Scott J
1978 240D