how do you now it is not working? I tested mine by unplugging it and
seeing how the engine ran different. Also, if you timing is off or you
mixture is too rich you'll get oxygen sensor fault codes.
matthew
86 syncro westy tiico

Matthew Pollard          "Racing with the wind and flirting with death
Dept. Of Chemistry        So have a cup of coffee and catch your breath"
University of Idaho
www.uidaho.edu/~poll7356