Help Converting VX from CA to Federal
 

I have a 1992 Civic VX with a 4 wire O2. I have a federal ECU and was wondering what in the wiring harness needs to be replaced. Do I just need a VX Federal wire harness for under the hood or the complete harness past the connections on the firewal to the ECU?

Was planning on installing a 5 wire O2 to plug into the harness.

wow, that is strange. I thought all 92 civic vxs came with the 5 wire o2 sensor. my 92 CA emissions vx did, all it took was replacing the ecu to convert it to the federal emissions.

Ditto!