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If you have already taken the top off you could have permanently damaged the components in the pump. The conditions required to work on pumps and injectors are similar to a operating theatre and the tools required are just as important. Water vapour and dust as small as 1 micron (1/1000th of a milimetre) is fatal and the damage can be caused in seconds. Personally I would not want to have my appendix removed by a janitor with a bowie knife on the hospital car park :0)! Please remember I am trying to save you money when I say this, as I have seen people cost themselves hundreds of £'s ($'s)by trying to work on pumps and injectors themselves. These parts work at pressures of over 2700 psi so the slightest mark on any component will allow diesel under that sort of pressure, to leak past. However, I would agree with Davey that your rack that moves the pumping elements to increase the fuel to the injectors, is stuck. This will require moving from side to side with a screw driver. With the side plate off, work the stop control and see if it moves. If you have a vacuum governed pump you may have to remove the stop control housing at the back of the pump and free off things in there. Hope all goes well!
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