oxygen sensor are they all 3 wire ?

[loboreno]

I have high flow y pipe with my old o2 sensors from a 91 motor. And have x2j computer .... did the new computer have a 4 wire o2? If so will it matter? Thank you for any help

 

[Phoenix]

If I remember correctly , the automatics 3.2 had 4 wires , while the 3.0 MTX had the 3 wires. Do not use a 4 wire sensor on a 3 wire harness.

 

[3d914]

Phoenix is correct - checked the schematics.