Vectra C, Z20NET - Breaks when accelerating, throws the check engine (blinks).

Hello,

Gentlemen and ladies. I have a problem with my Opel, Vectra C, 2004 Z20NET engine (Saab B207R). Well, when accelerating, especially from 4th gear up from low revs, when I step on the gas pedal more rapidly, the car "chokes", it stops accelerating, when I let go of the gas, it stops and I just have to add gas more smoothly. If, on the other hand, I do not let go of the gas and I continue to try to accelerate when the car does not feel like it, the check engine starts flashing. In this case, when I turn off the ignition and start the car again, the check does not light up anymore. I had such a case before, it showed misfire on diagnostics, but it passed the same after some time, but the topic came back. I suspect an ignition coil, unfortunately, how to check them? The coil is Mitsubishi H6T60271.

Check the vacuum and read errors if possible.
Check errors when the check is flashing and after deleting.

Tomorrow I will have an opcom, we'll see what he says.

Edit. Op-com threw error P0304. I replaced the candles (I had such an intention before, because the old ones were worn quite clearly and in addition they were vaulted for some sick 0.6mm gap. Additionally, I cleaned the plugs from the coils with a preparation for contacts. The problem is gone, ignition does not fall out.

Despite everything, I think that I don't care for a leak, because the car does not accelerate as fast as before. The turbo blows 1.15 bar and when everything was ok, it was 1.3 bar, and of course you can hear the whistle of the sucked air. I did not detect anything when I sprayed all the wires, optically they are all ok. I'm afraid that the IC has a hole. There is probably no other option than checking with a compressor.
I would like to add that the engine is actually removed from the Saab Aero B207R, additionally a larger IC and the program at ~ 235KM, hence the boost values.

Edit 2.
However, the culprit was the coil, replaced and the car runs as it should.