Engine code: 617 912 12 162 197
Transmission code will come up later, I will edit this post when I have it. Will be looking into checking the modulator via this method, and hopefully that will be most of the problem...

Also, Secondaries, thanks! What you said makes me wonder if part of the system is missing, or the lines are hooked up backwards...

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1984 300D (Turbo)
1949 Dodge B-1-C 3/4 Ton truck
1985 Euro w123.130 300D (Naturally Aspirated)(bad transmission)

I have studied many philosophers and many cats. The wisdom of cats is infinitely superior.--Hippolyte Taine