Car jerks when it's almost hot, HELP PLZ!
 

At the morning, when I start my car, it moves good for the first few minutes. But then, when the car is almost at the normal temperature (the pointer in the water temperature gauge is almost at usual place) the car starts to jerk like the fuel is running out for one minute and it feels stronger in low rpm's. And after then (a minute or two) the car moves good.

The sparking plugs are new, injector is clean (cleaned it hoping it would help, but...).

The air filters are rather dusty, but can it be because of them?...

BTW, my friend has EX35 and he has the same problem. We both live in Ukraine and the fuel is rather dirty and has a bad quality here...

Another friend on '08 G35x sedan confirmed the problem. He has it for about a year.

Hey man! I am also from here! I have got 08 g35x with 15k km on it, it runs fine!

Well, and where do you drive it? :)