1. Could be faulty oxygen sensor that screws up your air-fuel ratio readings.
2. If you have replacement ECU or piggy-back installed and you have put in new tuning bits, could be the settings/mappings need to be checked
Hi to all sifu, iam planning to get a Altezza but its still manage to get loan , and how about petrol i heard only manage to use RON 97 only need advice TQ :D