DTC P0350 in Hyundai H1

Good evening: it is a Van Hyundai H1, 2.4 Lts engine, synchronous or manual. A; or 2007. Thank you.

Well, you should check the coil connector that fails you, see if the positive current does not miss the shack.
Finally, check the continuity, the ECU (engine computer) and if everything goes well, you would have to do if the signal comes out of the ECU
with obsiloscope, to see if the problem is there in the ECU
.
GOOD.

,,,, thanks I will do the tests ..

Good ,,,, I already did the tests. I just have no oscilloscope, and I can't do the tests with oscilloscope.

If you have continuity (and therefore voltage) from the ECU to the injectors. (Tests with bicolor and multimeter diodes).
It only stops sending impulses to the injectors when it has the failure in cylinders 2 and 3, but the coil does work.
I need to test the pressure to the gasoline pump, an adapter for that test is needed.