Yes it should have 5.5-6bar pressure from pump-metering head at all times (fuel accumulator holds this pressure so it will start easily after shutting off)
copied from another thread, which may give you a starting help
"You won't get fuel to injectors by just having the fuel pump running, you need to have the pump running constantly and press down on the metering flap at the same time. you may not need injectors out, with pump running and pressing down on the flap gently, you should hear the injectors making a squeeling noise if they are opening.
If fuel pressure is low, injectors won't open, think it needs to be 5.5-6bar. "
Sorry, just sick of typing it every odd day
