Thank you wheelbender6, I readed and participated on the post you linked some months ago
. The truth is I don't have time to investigate and play with this (this is why I went to a specialized shop for the ECU tuning, still waiting for they to call me)
The rheostat method is intresting, I'm going to read about it to see if it can help me.
Also, for the moment I won't change the injector because it's too much work but I'm going to change the air filter and the fuel pump for a "performance" one.
Do you have any prefered brand for the pump? or I can safely go with the generic chinese ones?
Thanks!