I managed to pull 6K ohms out of the circuit between ECU pins 5-21 today with car cold just by cleaning and tightening connections and it greatly improved things. I’m curious how far I am from average. I wonder if anyone could take a resistance reading at the ECU for me? Idealy a lucas HE. Readings while jumping out both sensors would be awesome! Readings at temp would be ok if you’ll tell me the temp I can compare to.

Should this circuit be ~1-3 ohms with the sensors both jumped out?

5 to 19 (CTS). And, if you don’t mind, 5 to 21 (both sensors).

With the ECUs longer row on right, That would be 5th from top on right side to top left and also to third from top on left.

 

With the sensors shorted the resistance should ideally be under 1 ohm. But you need to null the meter as the probe leads could account for up to 0.5ohms.

The ECU does not look at the resistance, the ECU measures the Voltage and any increase in R in the wiring will lower the voltage.