[esq'z me]

Found in a box of miscellaneous MV stuff I am going through. No idea what it is/does.
From a first generation 4 cylinder.
Anyone here that can ID it ?? 4 wire plug with an additional frame ground wire and a tiny green LED ('on" indicator??)
o2 sensor eliminator?

 

[makarushka]

o2 sensor eliminator?

Well, Dynojet refers to this as "O2 Optimizer", I believe It's one of theirs no doubt

 

[esq'z me]

You are absolutely correct !!! Thanks. I thought as much but was looking for proof. DynoJet it is.

 

[EBBO]

Piggy backs with the old Power Commander.

 

[Blacky]

Google is amazing. I found the same answer in about 20 seconds.