Quote Originally Posted by mudski View Post
That amibient sensor is for the Ti models which have an outside temp display and climate control.

Cuppa, try just disconnecting the loom to the fuel filter and leave it off for a while. If the issue goes you know where to look...
I didn't know there was a Ti variant in td42 range...


Straight off Patrolapart:
Suit GU*Patrols with TD42ti (factory turbo intercooled engines ONLY)

This is the ambient air temperator sensor that is connected to the engine ECU.

This is very important that is is in good working order, as it adjusts the timing of the injector pump to suit the ambient temperature.