Assalam o alikum,
i have honda civic vti oriel prosmatec 2005 but its original engine was swapped with D15B 3 stage vtec (JDM) engine
now the car is giving me very bad mileage 7-7.5 kmpl max with A/C on in city.
and i am skeptical about its wiring and the ECU installed (i think the ECU and Wiring was not changed at the swapping time and is pakistani ecu)
how can I check if the ECU is correct and there is one device beside the engine that is not plugged in i am not sure what it is.
please guide me.
this port is not plugged can anyone tell me what it is