Anybody know what this is?

[Rick Riffle]

I hope that I am not going to be embarrassed by asking this, but what is this? It is mounted on the passenger side of the upper firewall on a 1972 Dodge Demon 340.

 

['63GT]

Memory is a bit foggy.. but I think that's the OSAC valve

 

[Rick Riffle]

Memory is a bit foggy.. but I think that's the OSAC valve

I really don't think so. There are no vacuum hoses attached to it. Only 3 wires that don't go anywhere. 'It could be something to do with emissions. The car originally came from California.

 

['63GT]

I really don't think so. There are no vacuum hoses attached to it. Only 3 wires that don't go anywhere. 'It could be something to do with emissions. The car originally came from California.

You're probably right... I had a '72 Challenger with one of those on the firewall to. Like I said, I'm a bit foggy...

 

[67Dart273]

NOX See page 25-7 of the factory (Plymouth) shop manual, which you can download free from MyMopar. No, I don't work there

 

[xLURKxDOGx]

That looks like a horn relay? never mind....

Jake

 

['63GT]

Thank you 67dart273.. that made my headache go away

 

[ESP47]

Yep it hooks to this device I asked about years ago when I was wondering the same thing myself.

Is this the OSAC valve? - Slant Six Forum

 

[6pk2goDemon]

Here's another picture from the manual with text to explain the NOx system.

 

[Rick Riffle]

Here's another picture from the manual with text to explain the NOx system.

View attachment 1715219883

Thank you for the information. I guess I don't feel embarrassed after all.
One more item that I can delete to clean up the engine bay and wiring.

 

[mbaird]

I wouldnt toss it out. Probably a very hard part to find if you are restoring a car that needs it.