Hello everyone. My car is a 2000 model, 1.4-liter gasoline engine, and produces 75 hp. The engine is rough and jerky, and when the engine speed is low, it vibrates and struggles to move forward. I took it to the dealership, and it stayed there for a week. They tried four new injectors, but the problem didn't go away. The throttle system was then removed, but the problem still persisted. Finally, they told me there was no other option but to replace the vehicle's ECU. I'm also experiencing issues like idle fluctuations and accelerating on its own. My question is: Is replacing the ECU a very difficult task? Will it be difficult to remove it? Should a new one be replaced? Has anyone had these issues with an ECU before? I'm very concerned. I'd appreciate your thoughts.