Yeah, sorry to dissapoint you MystiqueSVT but i had it tested with 3 different coils, 2 sets of plugs and 2 sets of spark plug wires and it is still the same. I had a donor car and the firing order is exactly the same as my running one was, as well as the substitute ciols wires and plugs. did not help. And what do you mean bu check the pistons and the coil pack location?
And dallasb84, you might be right. i will check the EGR valve and tube (whitch look fine on first sight) but i wil check them again. I am also thinking the worst option as you are - valves or timing chain... and how i wish we are both wrong