nlsolja123

What will be better, going by the factory readings or off my aem uego?

9krpmrx8

iTrader: (46)

Better? Depends on what you are trying to do and where you have the AEM sensor mounted in the exhaust stream.

nlsolja123

I guess i ment more accurate, my aem is mounted in the 2nd o2 bung, and its readings seems to be pretty off from the stock sensor, example,, it shows a 15.8 when stock says 14.3 car smells rich so im guessing stock is correct

9krpmrx8

iTrader: (46)

Well if your stock sensor is working right (they typically slowly die and become inaccurate over time) it is very accurate and they should be close. I have sensors in the same locations, except a PLX setup in the secondary O2 location and they read very close to each other. Except the PLX has a wider range on the low end.

14.3 is not rich, but the the stock tune does run rich in areas. That said, I have heard of numerous problems with the AEM wideband.

nlsolja123

I think it's the aem. It's off by around .6:1 at times. I probably will get a new oem one due to high mileage though