Won't Start, Glow Plugs? Injector pump Timing? Volvo 760gle HELP!!!

[mike]

Hi

Well she started yesterday. It was a really hot day and I was in LA picking up the car. The transmission was JUST replaced. No problems starting on the first try. I probably started and stopped the car 8 times that day. Perfect.

Today is overcast and in the 70's.
Perhaps that doesn't make a difference but it won't start.
It does turn over and has plenty of battery.

Any suggestions?
Also, it's been kind of smokey. Grayish black color, especially when I step on it.

Could it be glow plugs? How do I test them to determine if they are good or not? I was told it is a measurement of resistance in Ohms. Does anyone know what is good and what is bad?

Could it be the injector pump timing? The day that I bought it, the old owner adjusted it a little without taking measurements of any kind, just advanced or retarded it a little. It was a freezing cold, 28 degree day and it was having trouble starting. He made an adjustment to hopefully help with the starting but it ended up that the first glow plug was bad. He replaced it and vooom it started right up.

I'd appreciate your advice.