Quote:
Originally Posted by rwm514
I'm wondering if I should start with replacing the o2 sensors or try more diagnostic work to see if its a vacuum leak. What do you think?
|
If the 02 sensors is indicating a "Rich" condition they are fine. You can verify this with a scanner that can read real-time data. The front sensors before the cat should show a variation in the voltage, while the voltage at the back of the cat should be constant.
Why do people always blame the 02 sensors for a rich or lean condition?
This just tells me that they know nothing about how to fix a car.
Here's a video on good 02 sensors on an X5.
https://www.youtube.com/watch?v=zyh_4SktmFM