Thanks for the reply. True that I have two temp sensors, one for the ECM and one that runs the gauge and electric cooling fan. Part of the problems I have been solving come from using a donor harness. It was in fairly good shape overall, but did have some issues such as the bare wires on the ICM plug. I plan to spend some time this week checking wires and voltages again and doing some data logging to see if I can see the intermittent temp failure. Glad to know the CTS would not cause the stalls. Didn't think so, but it's nice for validation.