I own a 2010 Honda City in Pakistan. The car is experiencing serious power loss. It cannot accelerate properly — even on flat roads it does not go beyond 20 km/h. On hilly roads, the car completely loses power and stops. Acceleration is not smooth at all. Several local mechanics have tried to fix it but no one has been able to identify the real issue.

The engine runs, but the car feels like it's stuck or extremely underpowered.

I would greatly appreciate your advice or guidance on what could be causing this problem. Thank you.