On my Td5 the temperature gauge never rises very far outside the cold zone but whenever I press the accelerator pedal the needle on the gauge drops into the blue/cold zone immediately, then rises again as soon as I take my foot off the accelerator. There seems to be a direct link between the accelerator pedal and the position of the temp gauge. Since this problem manifested itself I've flushed the coolant, replaced the thermostat, installed a new coolant temperature sender and refilled and bled the cooling system but the temperature gauge is still affected by the accelerator pedal movement. I've cleaned all the battery and engine earth connections and the contacts at the temperature sender but this hasn't made any difference and the contacts looked OK before cleaning anyway. I'm thinking that there's a short somewhere or possibly an ECU glitch, electrics is not something I'm good with. I did have a small drop of engine oil in the red ECU wiring connector socket so I fitted a new injector harness and I don't think any oil got into the ECU. This temperature gauge (linked to accelerator pedal position) problem has me baffled, any insight into to the possible cause of the issue would be appreciated, it may be a short so if anyone knows if or where the accelerator pedal wiring could make contact with the temperature gauge wiring or any other reason why the temperature gauge would drop instantly on pressing the pedal and rise again as soon as the pedal is released I would be most grateful. Thanks, LarryK