My car flooded and after that engine crenk but not start then I washed ECU with petrol and it's work again. Now it start show different issue the RPM is unstable and consume lots of fuel I replace the air flow sensor as per mechanic guide & it still not fix ️ then I show ECU to computer guy he tried to repair but not get success and asked me to change the ECU which cost around 18k for my car and 6k for labor work.
According to mechanic it's alter ECU and it's city for manual transmission, you never got fixed this. After listen I realize that my only option to replace but still worried will it work or not
Please guide me how can I fix this issue, I want to keep this car for long term