After all the time/money invested in this investigation, the problem have finally been caught. O2 sensor was broken, which leads to the lack of oxygen led into the cylinder, thus no power. Now the interesting part is when the shop plugged the computer to the car, it shows that the car is fine, even when the car dies!!
Anyway, the problem has been fixed, and it works like a charm now. 
See how much cheaper it is when you figure out whats wrong instead of buying a whole new vehicle?
