Ford Focus 1.6Ti-VCT 2006 (115hp) - Ignition Loss: Spark Plugs, Ignition Coil, Fuel Pressure & More

Hello. My problem is falling out ignition in 1.6ti-vct engine (115hp). Already two mechanics spread their hands.
The problem appeared about 2 weeks ago suddenly. Since then, I have replaced the spark plugs, the ignition coil and HV cables have been checked. Fuel feed pressure (4.5bar) was measured. Cylinder compressions (11-11-11) bar were measured on each, valve clearances were checked (normal), injections checked (working). Timing gear replaced 12,000 so it's also not a cause. I do not pour oil. Coolant also maintains its condition. I even checked invoices or refueled diesel (in total, it's a pity that not because the problem would be solved).
My ideas are already over ...
Maybe someone once had a similar case or heard something. Thank you in advance for your help.

What are the symptoms and under what conditions?

Symptoms include jerking the car at a lower speed and "shots" when adding gas quickly. It goes a bit when the engine warms up but still occurs. After exceeding the turnover of 2-3 thousand, the effect disappears or doesn't feel it, which is supposedly possible. To sum up, the effect of not equal engine operation as it appeared two weeks ago has not disappeared so far.

patency of injectors, possibly blurred valve guides.

besides, it is worth checking the reading from the rest of the sensors.

Check how it goes "wrong" after unplugging the first probe. My way is too poor and hence jerks and arrows. Test it on OL without a probe. How will it be better to control MAF or MAP depending on what is sitting there.

Symptoms on the ignition system. How checked the wire and coil?

Coil and wires replaced with new ones, no improvement. I haven't actually unfastened the probe yet. I'll try.
Kirde when it comes to valves, one mechanic checked the looseness and they were Ok. However, I did not know if he checked the guides, and I am not such an expert. The car computer after connecting only shows the loss of ignition on the 4th cylinder. Already one guest threatened me with 11atm. This is not enough and this may be the reason. Two more say that there is nothing to cling to compression. I don't know anymore

For a little naturally aspirated, after 13-14 he should have. Do you have LPG?

There was never LPG in the car

Added after 2 [hours] 35 [minutes]:

And I picked up the car from the workshop. Lights up normally, the starter turns a little weak, so maybe the battery is running low. As for compression on warm engines after 14atm. on each cylinder. The reason for the ignition is candles. Although the new ones are supposedly not matching this version of the engine. Changed to iridium denso and ignition no longer falls out. It looks like the problem is solved. They also said that when Brdo's something is wrong they do it for free. I paid PLN 400 today. I will go a little and write if the problem has appeared again. I think there are mechanics and mechanics too