That does seem too soon. It shouldn't be reading a normal temperature in less than a mile or two. You might want to find a scanner you can borrow to view live data on a test drive. That will show the actual coolant temperature the Engine Computer is seeing from its coolant temperature sensor.
Someone else recently posted a reply that there are different gauge sensors for different engine sizes or years that bolt in the same but have different resistance values. These sensors don't fail very often, other than Ford's sensors for the Engine Computer, so the wrong sensor would make sense. You can also compare the resistance of the old and new sensors but that has to be done when they're at the same temperature.
Wednesday, October 31st, 2012 AT 10:37 AM