Where do the O2 sensor wires run to? It seems that they run to the back of the engine somewhere? I think they are connected wrong somewhere or not at all if that's possible when the engine swap was done. They few people who have read them said they do not thing the sensors are faulty as ALL 4 went at the same time and are not reading. Suggestions again from the experts?

I appreciate everyones help.

 

They run up into the firewall below the glove box behind the kick panel to the ECM.

If you have the RAVE, you can look it up in the engine management system and see the entire circuit with wiring. The pink & brown wire in each o2 harness connector plug is the power wire, you can check the corresponding "prong" inside the connector to see if they are getting power. The other three correspond with the ECM and you can test them for continuity.

Are you getting codes? No activity?