Okay, during the extension, there was a thick light blue wire with a blue/green and a blue/yellow inside it with shielding....what are these for? Also, there was a gray thick wire with a white and orange wire inside it with shielding...what are these for? then there is a thick black wire with a blue/white and an orange wire inside with shielding...what are these for? Is it imperative that they are shielded well? I would assume so. I have no codes on my car at all and the car is running fine, however, i am still not getting anything on my A/F gauge even after i spliced the sensor wire of the gauge right into the OX wire in the ECU plug. I have some wires that aren't shielded properly and i am not sure if that is the problem or not. i want to make sure the O2 gauge is functioning properly (shouldn't the car run like shit if it wasn't?). Also, i have been running rich...i can actually smell fuel faintly (no leak anywhere) around the turbos. is this the O2 sensor not doing it's job?