Be very careful with so call performance chip on Ebay, specially the cheap one’s. I did buy one from tunedengineering, I didn’t get a chip to improved on
gas and performances as advertized, I received only a 30K resistor to be pluged on the IAT ( intake air temperature). My son (majoring in mechanical engineering) forbid me to do that on the car, as he explained could damage the engine, making it run to rich, resulting in a washing of the cylinders wall,
(be like an engine running without oil). If anyone need to ask him about that, you can contact him at: <cymax666@gmail.com>. Also on them letter with the resistor, they said “if you give a negative feedback, you will get one in return” even if you was the best buyer on Ebay.

I hope this will help, thank you. Luc