H1 does not start after engine change

Hello together I have the problem with my TQ that it no longer starts after the engine change. The regenerated engine was replaced in a Hyundai workshop, but somehow does not want to wake up to life. The attachments of the old engine were taken over except on the glow plugs. On last Thursday came the assumption that the HD pump does not promote enough. New outdated pump worried and installed. Missing again too little fuel at the injectors. Is the fuel system of your workshop car in my to find the source of error?? Is there any experience what may have gone wrong during the exchange? I almost suspect that somewhere electronically a signal is missing