You say it started but it seems it will just idle, is this correct? You also said that you checked the injectors but there was no pressure, do you mean no fuel when opening the high pressure nut?
both bosch and lucas fuel pumps have auto cold start fuel and do not require full throttle to start but if the engine does not run then you need to ensure system is completely full of fuel. Bosch systems depend on the injector pump drawing fuel from the tank via an internal suction pump. Lucas pumps are assisted with another " lift" pump. Determine what system you have first. Both fuel pumps are expensive to fix and the injectors are not cheap either. Another common problem is that if it does not start it is possible that one or more injector is "stuck open" allowing compression down the injector pipe and into the system, worth checking if vehicle does not start. If it does start and just idles smoothly then injectors are fine. A lot of things can be at fault here and unfortunately you need a process of elimination. good luck
Swedish tony, November 2006