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I think the OP believes the sensor gets warmed by surrounding parts. And he thinks that although the air entering the engine is the same temp as ambient, the warmed sensor reports a higher temp to the DME.
I’m trying to be neutral here but it doesn’t add up to me. OP, look at that sensor pictured above. The black bulb is what actually reads the temp. Look how little contact it has with any surrounding surfaces to get “heat soaked” by them. Also don’t forget it’s in a constant stream of fresh flowing air which will also minimize it getting heat soaked.
Maybe those older cars you mentioned used a more primitive, inferior temp sensor. For our cars I don’t think moving the sensor does anything. I’m only going with my gut though.
I would love to see actual data to prove me wrong. Very easy to do, you already have both sensors installed now on your car. Can’t you just run your motor plugged into stock sensor and then swap to the extended plug and run it again? Sample the 2 temp data.
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