alignment error??!

[picks]

1) not really sure where the vibration comes from exactly, it feels like from all 4 wheels,
2,4) doesnt increase with speed, only that when driving fast, the car is vibrating seriously, while slow, it just like going through humps, but definitely no pull and push effect, but after long hours of driving, then will start to feel this pull and push effect, the car's power is unstable. but really wonder, the car is going at constant speed, no dropping of rpm and speed, but can feel that the car loosing power at a certain interval. (WHAT HAPPEN!?!?!)
3) em,...not sure bout this humming sounds. only that since i'm having all the BOV working, my blow off sound real quiet, and hear a weird sound i never heard b4 this, almost like humming sounds,
5)below 100km, no vibration. only humps.

hopefully i've all the answers to ur question. :)
really need help here. as not knowing anyone else with this car.

cheers mate!!!!!!!!

 

[V-Spec]

picks, try to check for ECU error codes. Is your O2 sensor ok?

 

[picks]

wat's an O2 sensor?
:) pai seh ya..

 

[V-Spec]

02 sensor measures the air-fuel ratio of your engine and adjusts the injectors accordingly. I've got a pic of the ER34 ones if you need to visualize the part.

Check for error codes if there are any.