Bmw E46 2004 330 diesel just cranking not starting. We have tested the fuel pump is working and there is pressure going to the injectors. We recently did a diagnostic and it picked up all 6 glow plugs were not working. We replaced this and yet it still does not fire up. The glow plug relays are working under the glove compartment. The fuses in the engine bay are fine. The car does start with quick start but only runs with this... once we stop spraying this the car switches off. What can I do to fix this?