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Weird Intake temp sensor thing


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I`ve got an bad IAT sensor code on my diagnostic.

I have no wiring for this sensor on my `92 OBD1 vr6, I found that the signal for IAT is on pin36 on ecu plug.

The problem is this wire from the ecu is going to the 3rd black (2pin) flange sensor. Now I wonder if it`s factory that this sensor replaces IAT or what, it should be AC sensor as I know. But my car is non AC.

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PB033951.jpg

The connectors in yellow circles are the same, as I mentioned signal for IAT on pin36 on ecu plug is going on this black sensor on flange. I'm sure it cannot be that factory, someone played with the wiring for sure...

Some people are using IAT from mk4 1.8t to get a few 'horses' becouse of his abillity to measure quick changes of intake air temp a lot better than factory IAT which needs some period to cool down or to heat up. If i'm using this flange sensor instead IAT it would give informations of water temp, not about intake air temp and I'm sure I'll got less power on that way. It would give informations about hot air all the time, and the car for sure won't run as it should... That's my opinion.

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