I have a problem that it is running lean

[lancerevo]

Hello

I have a Kia pride 1.3 be engine efi. I have a problem that it is running lean. It has a new o2 sensor used maybe 1000 miles, new spark plugs used the same mileage. A cold air intake, Exhaust mufflers removed only the middle resonator. I have a problem of running lean. I checked the spark plugs and they are white. I think it is running lean. Normal air/fuel ratio should be brownish color. What shall I do to enrich the air/fuel ratio a bit?

Thank you

[grey]

Hello
has a new o2 sensor

is it a bosch or ebay brand sensor?

is the vehicle an obd2?

[lancerevo]

is it a bosch or ebay brand sensor?

is the vehicle an obd2?

It is an ebay o2 sensor. I think that is the problem. What do you think? How could I find out if it's an obd2?

[grey]

obd2 was required beginning in 96. Some cars got it early though. I just wondered. You can research to find if it is obd2. The engine compartment labels, door sticker, look for the plug (although that is not certain), there is a list of obd2 vehicles on the internet somewhere...

Try to read the sensor output