Manifold temperature sender

I've seen suggestions that as my 4.6 HSE is a poor starter with no rapid idle and even when warmed up a poor idle i should replace the inlet manifold temp. sender befor changing the air flow meter. Anyone know the part no for the Temp. sender?

Check the crankcase ventilation first. Both sides should flow reasonably freely if you remove the hoses from the intake side and blow in them. The flame traps clog easily.

Many thanks for the suggestion sounds like a bit of a saturday coming up.
Went to LR parts department to find the suggested manifold temp sender but the parts chap said which one as ther seems to be 6 different temp sensers on the top of the engine????
So back to trying to find out which one of these senders I need by description of location or part number.
cheers
will