Hello, check several things in your vehicle before making larger disruptions, I suggest you:
1- With the help of a gas analyzer, check that the CO2 is in a value greater than 12 or 13 ppm (the greater the value is better the combustion), that the values of CO and O2, are as low as possible and their values are related (as close to 0 possible and that their vaalors are very proxim CO value is greater than that of O2, there is greater consumption of gasoline, if on Quanto ao contrário, o O2 é mais alto
,
uma mistura ruim.
Saudações