A couple weeks ago I ordered new injectors (remanufactured Bosch ones, from Pelican) and decided to take the IP off to change a of couple oil seals. After I had gotten it apart I decided to replace the governor diaphragm while I had the pump off and then replaced the o-rings on the poppet cam. After I got everything back together and bled the air from the system the engine started but actually runs worse than before. It has a violent surge at idle, shaking from side to side along with some nailing. The problem disappears with my foot on the gas pedal. It was present before but only at a certain rpm range (about the mid-point of the idle adjust knob range) and not as bad.

What might cause this? Do I need to adjust the linkages? Did I fudge up the timing?

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1973 220D ~135k Mi
1979 Ford F100 300 I6 - 225k Mi