'82 240D will not start

[airfoill]

I've done a search on this problem and have done mostly everything recommended.

The car has 250K.

Car was running fine and started fine until about a week ago. Here in Houston, we had a very snap (cold for Houston) where the temps got to 26 degrees. Next day tried starting and it did't even try to start.

We've had temperatures here recently go down to about 32 and the car would start with no problem. Now nothing.

I've replaced the glow plugs so far.

I've made sure the new plugs do get power and i even tested each one and they do get red hot using their respective leads.

I pushed on the primer about 30 or so times and fuel is circulating through the system.

While plugs were out, I tried to see if there was air in the system by turning the engine with the accelerator pedal to the floor and saw alot of diesel mist being blown through the holes; so it does appear there is no air.

The battery is up to the task and turns the engine over pretty well.
I have not adjusted the valves and it has been a while since I have but it's not logical that this car was running perfectly until we got the cold snap and now it won't want to start.

I even sprayed some WD40 down the intake while cranking and nothing.

Suggestions?

Thanks