A typical OEM switching type O2 sensor will not work with this project.
This
project requires a 2 cell wide band O2 sensor that was used on a lean
burn
Honda Civic. It is available from Honda dealers, and from
www.hparts.com.
Application/part number: 92-95 Honda Civic, 1.5 VTEC, 36531-P07-003
Picture of the Honda/NTK sensor
Data sheet for O2 sensor (PDF)
The generic NAPA equivalent may be cheaper, but may not be widely available:
NAPA Part number OS791. The thread on this sensor is 18 mm x 1.5 mm
pitch.
Mating connectors for the sensor can be found on Civics and probably other
Hondas, even if
they weren't lean burn. Try looking at: