Coolant Temperature Sensor

Hi all

I have some hesitation/stumble issues with my TT and have been going through the checklist of known causes.

I've just done the coolant temp sensor test at: http://www.300zx.net.nz/articles/MainLib/HowTos/heasitation/whencold.htm

Supposedly the voltage of the temp sensor is supposed to start at 5V and gradually go down to 0V as it gets warmer. Here's my results:

Cold start: 3.9V

4 mins later: 2.3V

6 mins: 1.9V

10 mins: 1.25V

16 mins: 1.24V

20 mins: 1.2V

Note that the temperature outside today (East Midlands, UK) is about 8-10C.

Now to me, that starts off a little low and doesn't come down enough - could this be the cause of my problems - do I need a new temp sensor?

Thanks

Ross