Thats what Im thinking - my problem seems to be really weird. Just checked the wiring harness thoroughly - it is in good shape, continuity test shows all good. ECU is brand new from a different car, which worked in it fine, and my ECU didnt seem to be bad anyway.

I got no idea what it can be - everything is fine and is there, it just isnt producing any spark on cylinder 4... People suggested crankshaft pos sensor and camshaft position sensor. Can that possibly cause it - i head if the voltage is different on the signal form the CPS it may misfire on that particular cylinder whenever the voltage is different at that particular time - its a longshot... but i have to test EVERYTHING POSSIBLE... Does anyone know for sure?? I am seriously lost at this point...

-Artem