i may help here .....the ktronic system relies solely on good fuel pressure, it should be around 5 bar, there is an easier way to check roughly that the pressure is good ..switch off the pump and disconnect the fuel return line under the bonnet get a short piece of pipe and a suitable jug /container ..now you need the pump to work continuously easy way is to bridge the terminals 30/87 on the relay short piece of cable will suffice ,before you turn on the ignition remember the pump will be running and fuel will/should be flowing to the metering unit..... safety first ..might be better getting some assistance, place the pipe in the container turn on the pump if all is good it should be filling at a rate of approximately 1 litre every 30 seconds any less than this indicates that the high pressure fuel supply circuit is weak and not able supply sufficient flow at the system pressure .. if so it may not be the pump at fault other areas to check ..filter /accumulator check all pipework is acceptable from the tank to the metering unit remember safety first