To the best of my knowledge ect works well, being monitoring with the obd when am driving around. Operating between 156F to 208f of course at cold start dumping in much fuel which makes the car run rich for a moment before the turns to operating temperature.
Btw with your take, ect fooling the ecm should rather take out fuel when it sense the car is running hot but not adding ( run rich). Ecm run rich at cold start not operating temperature.
Stand to be corrected though.
Also how do I check if the timing is correct or #TDC
Can you educate me a bit here ?