Kind of misfiring

[oldskull]

Well its happened last year before winter. My car does sound strange, it was like fuel not got thru. Btw I always had e10 in my car only since last year I had to changed to e5. Btw when I got some strange thing when below 2000rpm, I had guess because of changed e10 so I got almost empty tank and I put e5 in it and drive a bit then it was ok. so in the winter last year the car stood still for 3 months and in March I started the car again and the problem came back and quite worse, so I changed spark plugs and still the same. but also tried to see if I run less cylinder, but take off sparks cable one at time and it seems good. then I tried the timing screw at tps and it was quite ok but still kind of misfire when I give some gas (above 2000rpm) so today changed fuel filter, it still same.
any idea? my last guessing is ignition timing and also might be injectors


EDIT: well after 2nd and 3rd check (with friends on whatsapp) seems like that the last cylinder not working and someone suggested to clean the injectors.