Opel Astra-G,Opel Zafira, Vectra-B - Irregular engine running | HELLA

Vehicle occasionally stalls; impaired idle speed control

If the above-mentioned symptoms occur on these vehicles, this may be caused by a dirty throttle valve. In this case, check the blow-by hole and, if necessary, drill open to 2mm. Afterwards, the ECU must be reprogrammed with a software modified for this purpose. The ECU software can only be updated by an authorised dealer.

Note: If a white dot (1) is already on the throttle body, this measure has already been done.

If not, proceed as follows:

· Remove the throttle body

· Secure the throttle body in a vice, protecting the contact faces from damage with a cloth rag.

· Drill blow-by connector (2) open and clean.

Make sure that no chips remain in the throttle body.

· Install the throttle body

· Mark throttle body with white dot at position (1)

· Program engine control unit

· Teach throttle adaptation using diagnostic tool. Be sure to follow the instructions from the car manufacturer.