Opel rekord injektion

No problem with cirkulation and coolant. The funny thing that it can run almost a minute without gas pump almost no pressure in gas lines...

Gas lines ...fuel lines? Hope you understand

I already wrote the fuel pressure is too low.
You have to adjust and check the fuel-pressure-regulator, check the function of the non-return-valve in the pump and the tightness of the cold-start-valve and the injectors. The system has to hold most of the pressure for a longer period.
One or more of the components are leaking and flooding the engine.

Regards
Norbert

Found the problem.ecu broken.cjange that and now it works fine