Thanks for the input. I have several books on mercedes. The last one I baught was a mercedes shop manual for the 110 engine. It covers everything you could possably need to know, except electronic fuel injection. Electronic fuel injections were only used on euro modles in 76. Amrican modles all used mechanical fuel injection. I have 3 diffrent Chilton and 2 Mercedes manuals. None of them have one thing about electronic fuel injection for the mid 70's.
Also I have a problem with the cold start valve. I am getting 12 volts to it cold and in the start mode. but it is not enough to activate the valve. If I jump a wire to it from the battery it works fine. Any ideas?