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C. Temp. wont come up above 170
Just got the truck, when test driving it the temp was doing the same thing, so when I bought it, the first thing I did was change the thermostat (OEM Motorcraft) and it seemed to come up to around 190 or so, good.
So today with ambient temps around 90, it showed good at 195 and then when i got on the highway, running ~70 it started to drop then reached 170 and didnt budge, even when i got off the highway it didnt go up, or down or anything.
Im leaning toward the coolant temp. sensor, i guess the thermostat could be bad, maybe I got a dud. The main reason im leaning to the temp. coolant sensor is it seems to get to 170 and just stop, no fluctuation.
Where is the sensor located?