Art,
I took measurements correctly tonight, backprobing ecu pin 13. I also measured the thermostat housing temp again for reference.
Initial start of the car
thermostat housing 22.4 deg C; pin 13 measured 2.2 volts dropping quickly
after running 4 minutes
thermostat housing 36.6 deg C; pin 13 measured 1.34 volts
Based on the first graph you posted these numbers look good.
I did order a 951 ecu; think I will also get an intake manifold gasket.
Could a bad cold start injector cause idle issues past the cold start phase?
Thanks
Mike
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