How important is cleaning the throttle body (TBI) in Citroën cars? Does dirt cause idling problems?

Yes, cleaning the butterfly body (TBI) This is a very important preventive maintenance procedure for Citroën vehicles with electronic fuel injection. The throttle body (TBI) controls the airflow into the engine, and the accumulation of carbon and oil residue, common due to exhaust gas recirculation and fuel consumption, prevents the throttle valve from closing correctly, especially at low engine speeds.

Dirt in the throttle body is the most common cause of irregular idleFluctuating engine speed, or the engine stalling when the car is decelerated. Cleaning solves this problem, restoring the correct airflow to the engine.

It is essential that, after cleaning, the mechanic performs the basic adjustment or reset From the TBI using a scanner. Since modern throttle bodies are electronic and controlled by the ECU (injection module), the module needs to be informed about the new “zero” position of the cleaned throttle body so that the idle speed is normalized.