hey guys ... unrelated regarding a lotus7 as i'm actually building an ls1 s2000 however your posts have helped a friend of mine successfully install an s2000 f22 into his '72 datsun 240 due to your experience on the subject matter so am hoping you can help me out!
i'm in the process of fine tuning my ls1 swapped s2000 which unfortunately is an '08 model year. for those unaware on '06+ cars the ect sensor (coolant temp) communicates with the cluster via canbus so while i've used a tach and speedo converter for the rest of the cluster am out of luck here.
in short i'm currently running two ecus (s2000 ecu for the alt/ect signal and ls1 ecu to run the engine) however cannot get the display to read in real-time for the life of me ...
currently i have an ap1 sensor threaded into the ls1 passenger head w/ two wires stemming from such (from the sensor grn/yel goes (sg2) goes to pin23 on ecu connector 'a' while red/wht (ect1) goes to pin8 on ecu connector 'b'). the ecu itself has 12v switched ignition power at pin(s) 2/3 and ground at pin(s) 4/5 on ecu connector 'a'.
if i put the temp sensor in hot water and turn the car on the display will read as should however if i remove the temp sensor with the car on and let it cool down the display will not drop.
in turn if i turn the car on/off the display will then read at the cooled temp.
i hope this makes sense as it's driving me absolutely crazy, help is appreciated!
for those that care here's a link to my build page -
https://www.facebook.com/s2000build2014/