240d wont start, simple but I cant find it

[Treeman]

'77 240d, 288k
I have two problems here, one might fix the other. But yall are going to have to tell me. I cant figure this out. Once I get the car push started it runs fine. If car cools off say overnight. It will not start!
I cycle the New Glow plugs twice and on the second cycle I will let the plugs heat for more than 1 minute. Nothing. After the second try Im usually out of patience and push start the car. Starts everytime as if Im pushing or the key works as long as the motor is somewhat warm. I thought I had it figured out that I had air in the lines. So I replaced all the lines, from the rear tank to the IP and any others I could see. I also changed all filters. All fuel and air. Tightened all hose clamps and put a wrench on everything that the fuel would pass by or through. I then replaced the hand pump with a new one. Still nothing unless pushing or warm. I then ran a half of a can of 'Seafoam' through the crankcase and the other half through the fuel tank.
The only thing I have not done is replace the starter. The battery is brand new. (?) The other thing that may have something to contribute to the problem might be the vacumn lines coming thru the firewall seem to be leaking down as they squeal when you turn the engine off. If you disconnet them the motor will not turn off. So that is why I am thinking it might be part of the problem related to the hard start or not. Regardless I am asking for help and suggestions. I have the mechanical ability of a silverware drawer, so please ask questions if I left something out.
Thanks in advance, Treeman