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Dude thank you so much. The temp sensor thing actually makes sense. When you say the connection mod are you talking about the Witt’s end mod to use the newer style o2 and move the pins around it something different?

The more I dig on this the more confused I get. I have found 4 o2 sensors. So it seems that this rig has 2 upstream and 2 downstream sensors which makes no sense on a obd1 car. Someone has to have a jdm car out there somewhere

Can anyone with a 93ish jdm 4.5 tell me which o2 sensors they have? Looks like they're both after the cat and 2 wire. The usdm and Australian have 4 wire and before the cat and I can't figure out what this stupid thing should have. Has anyone else with a jdm had to replace these things and have...