[cauzomb]

Sorry to dig up an old thread, my early 83 has the same sensor connectors, except missing the orange/single pin connector, the previous owner had spliced in a 1 wire o2 sensor and left the heater wire connector dangling, and completely cut off the orange conector where they spliced in the single wire o2 sensor.. What I have left at the wiring harness is a fat green wire, with two connductors, looks like a coaxial wire.

When I was removing the old 1 wire sensor, to replace it with a new 3 wire heated sensor, I lifted up on the crimped on one wire connector at the main harness, for the signal wire of the o2 sensor, and the crimp on connector just slipped right off that green wire with no effort at all.. This probly why my car ran so funky..

The green wire is dirty and oily looking.. after reading a few different posts and info pages about the 944 o2 sensor/replacement sensors.. I found info about how the sensor draws reference air from the wireharness.. I'm thinking since the factory harness is contaminated with oil it will no longer provide the "clean air" that the o2 sensor needs through the wire harness.. however, that orange one pin connector looks to be hermetically sealed to the single pin connector, and the single pin connector looks like there is no "air hole".. I'm not going to attempt to replace the orange connector, but It looks like I might have to dig into the harness a bit to find clean wire, then pig-tail a new section of wire to feed to the o2 sensor, Is that sensor plug completely air tight?

Also, the green wire has two condutors, "coaxial" I'm wondering what this coaxial wire needs in regards to a connector/sheilding and all... What wire is used for the signal? center conductor?

Thinking if it's a shielded wire, the coaxial connector needs to have the shield "outer conductor" to ground, and the center conductor is for the signal of the o2 sensor.. is that right?

Does anyone know how the old connector works? is the body of the orange plug connected with the outer coax conductor as a shield to ground at the engine bay?