PROBLEM STILL THERE.
Today I installed the new injector and idle shake continues, now it seems like the problem was not the injector but its somewhere in the pump, here is what I did: I installed the new injector and noticed it runs exactly the same so I pulled it and put the old one in and connected the fuel line to the new one and observed the spray pattern, it looked like very little fuel was being sprayed so I disconnected the #1 cyl line and installed the injector on it and the difference is very noticeable, on a scale of 1 to 10 if the number 1 cyl is a 10 then the #4 cyl which is the suspect one is a 2 maybe a 3. The injector lines at the pump are totally dry, where should I go next? could this be the delivery valve for that cyl? Don't know where to go from here.

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87 300d Turbo 241K with original #14 head (blue)
87 300d Turbo 198K will run great again someday (silver)
84 300sd sold ( buyer drove it to Paraguay )