Cool i have the wiring diagrams etc but wasnt clear which sensor when to which ECU etc the yellow was the main concern so if thats the one to the black fuel ECU thats cool and can trace and scope it.

I understand the thermo time switch but there is another coolant one round the back near the dip tube but a round plug which was coolant to so maybe got them 2 wired wrong as missing like hell when revving it arrrrrrr