|Originally posted by css9450:|
I was going to ask the same question.
I had a car once where the thermostat was stuck open. The gauge hardly moved, I had no heat in the winter, and the transmission wouldn't even go into TCC lockup unless I was doing a lot of stop-and-go driving and got the car good and warm. Looking back with hindsight, I wonder if it was even going into Closed Loop.
I wonder what the real temp is of the engine, has the OP checked the cars temp with another type of thermostat, candy thermometer is Old School and if you set it on top of the engine will give you a more accurate reading of its temp. or if you like high tech tools get a digital laser thermometer just point and read, this one works well anywhere on the engine and will give you a quick reading.
I second the open thermostat as well, with the engine cold pull the stat and look threw it to see if it is stuck open, also use the candy thermometer in a pot on the stove so that you can watch the opening the coolant runs threw, it can also open to soon, say around 120 and that would also cause this problem.
My first armchair guess would be a defective stat if this was an problem before you replaced the sensors. If not it maybe one of the sensors or even a wire that might have melted. But using my age old method of finding a problem I try to test everything before replacing anything. also try the easiest first, in other words in this case, just get a new stat and replace it and see what happens, if your is new it can be defective as well, if it is not it could also be defective from years of use.
Edit to add
how is the heat in the car? Does it bake you out of the car or just seem luke warm? if it is hot then I would say it is the sensor.
Technology is great when it works,
and one big pain in the ass when it doesn't
Detroit iron rules all the rest are just toys.
[This message has been edited by 84fiero123 (edited 06-30-2015).]