Sorry for starting a new post on this, but I can't think of what to do next. My 78 240D still won't start! I had troubleshot it down to what I thought was a bad fuel pump. I replaced the fuel pump, both filters, and installed parallel glow plugs. I just got back from towing the stupid thing around the neighborhood with no joy. It's a 4speed, so my buddy pulled me up to about 15mph, I turned the key to the glow plug point, waited about 5 seconds and dropped the clutch in 2nd. Sounded like it was running, blue smoke was coming out, but as soon as I pushed in the clutch; nothing. I also had the pedal to the floor while it was turning over.
I'm assuming the blue smoke was fuel, and if it wasn't a diesel I'd say something electrical was going on. I also checked each of the tips of the glow plugs with a 12v lamp and they were all bright. Help!

Thanks!