Hey guys have a question I need to ask out of ignorance... I notice the OEM gauge on my truck, ('05, auto, totally stock) quickly, but smoothly, rises from cold to approximately halfway through the normal zone. From that point, no matter what I do, whether empty or towing upwards of 7000 pounds, it rides at that same point, never moving at all. I am assuming that it is a typical Ford "idiot light" in disguise as a gauge. I have seen several posts on here that describe it as not being very accurate as well.
My question, basically, is how this gauge operates? The probe, I assume is just a basic thermocouple. Does the PCM on the truck see a real, accurate temp? Does the PCM just output like a switch function, showing basic setpoints on the stock gauge, therefore the lack of accuracy?
I am not a big fan of accessories all over my truck, I prefer the stock look (ie. I dont want to have to put a 3-pillar gauge in my truck, I actually use the pull handle, LOL). Plus, nice, shiny electronic gadgets just attract that many more thieves.... However, I would like to know approximately what my tranny temps are when towing... I was looking at getting the Insight to use for gauges. It appears to plug into the OBD port to get everything but the EGT temps. If the PCM is seeing an accurate temp that the Insight can see, is there anyway to change the programming of the PCM using an SCT or other device to see a good temp on the stock guage? It's probably way more trouble that it's worth but I was just curious if it were a possibility.
to anyone who might could help clear up my confusion!