What is this plug for

[sparky4017]

I have this strange plug in on my 83 944 anybody know what it's for

[AA_Ezra]

Holly POOP batman!... thats for the 3 wire oxygen sensor.. wonder how it's affecting you're gas mileage

[sparky4017]

Waiting on parts not running yet i will look for the sensor and plug it in what about the green wire
this go to the sensor also

[Arizona_928]

yepp O2 sensor!
green is the hot wire for the sensor. the two other ones are for heating element in the senor.

[ernie9944]

[QUOTE=sparky4017;5889816]I have this strange plug in on my 83 944 anybody know what it's for.

That plug if I remember well isn't connected anywhere,since your 83 has a one wire OS not a three.The green wire goes into the OS connector,left hand side on the firewall---- you migth have to zoom on it to see it clearly.In the second pic you can see the one wire leading to your OS.

[sparky4017]

Thanks Ernie i will look for the OS connector to see if i can find the other end

[Vicious]

the 83 came with a heated o2 sensor from factory, i also have the same setup.

[sparky4017]

So this needs to be hooked up I'll go see if i can find the other end i learn something new
everyday about this car this forum is great Thanks

[ernie9944]

There you are Tim hope you have luck locating that connector!!!!!
PS use ZOOM at 150% for better view

[sparky4017]

Thanks someone cut the plug off the green wire i think i can make a new one that will plug into
the existing O2 sensor i will post after i try Thanks for all your help BTW cool engine