Yeah just try another ecu for 13.

14 is usually a wiring issue

There are three temp sensors on a teg motor. One is the single wire nipple plug that just measures temp for your cluster, it is located on the cylinder head under the dizzy. There is a two wire sensor next to it which is the ECT sensor that the ecu used for its fuel correction, this is the sensor that throws code 6. The other is either located on the back of the block on a obd0 motor or on the thermostat housing for obd1 and up, this is the fan switch.