In order to verify the pressure in the fuel system, Opel Vektra V should do the following:
(1) Remove the supply hose and put it in a plastic bottle.
2) The relay of the gas pump and the closing of the contacts 30 and 87b (for the 20NU motor).
(3) Look at the stream of the hose-it must be flat for the whole time until the bottle is full. Otherwise, there is insufficient pump capacity.
4) Hose the hoses and the pressure to the compressor with the pressure gauge shall be removed.
(5) Compressor and pressure up to 2.2-2.6 bar (Motorface and Simtec), 3.0-3.5 (Multi-C and F), 0.8-1.0 (Multiop). The excess pressure shall then be released through the backbox. Otherwise, there is no pressure regulator.
(6) Connect the supply tube to the ramp, and put the fitting hose off (for example from VAZ) and drop it in the bottle. We're closing contacts again on the relay. The start must be the same as the first check.