i know that the engine bay temperature sensor is normally just above the expansion tank but i don't seem to have one, more confusing is i also don't have a plug for one to fit into, as my tf is a late 04 model i do have the factory low coolant alarm which is normally taped together in the same loom as the engine bay sensor. My engine bay fan used to work as normal until i had the 160 engine fitted and the ecu but now it stays on permanently so i disconnected it but i'd like to put this right if anyone has any ideas. I believe the fuse box was changed in 04 so i'm wondering were there any changes to the wiring? was the temp sensor moved? any ideas or advice gratefully recieved.