OK, I have checked the entire glow plug system- battery, relay, wires, and plugs and they all check out. All at .8 ohms on the nose, and also got battery voltage at the relay on all pins with the ignition in preheat mode. Rats, it would have been so easy if some of them were faulty. Next comes a retest of the compression, and I have just ordered new injectors. I don't know if that is all that is wrong here, but they are bad, so why not start there.

I changed the oil before I drove it up to 15W-40. Thanks