Dear Tom and Ray: This morning I went to my car to find that it had grown what appeared to be "hair" from the tailpipe. It was about 10 inches long and gray, with brown highlights. I had to get to ...

The oxygen sensors on your Toyota Celica help determine if the air-fuel ratio of the engine is rich or lean. This helps the electronic fuel injection adjust the mixture in real time and also reduce ...

Q: I would like to know when it is necessary to change O2 sensors. I have a Chevy Malibu 2001. Also, if these sensors are to be replaced, why are they so hard to take off? They seems welded to the ...