ECTs and Cooling Mods

So, I did the clutch fan delete, v6 eFan, and 180* t-stat. Have a Diablo tuner and unlocked pcm, so I set the fan/on temp to 205* and all has been good for 3-5 months. ECT stays around 187* to 195*, usually on the low end. It might spike around 207* at most under heavy load, but the eFan kicks on and quickly brings ECT down to 180s where it stays mostly.

A couple days ago, I decided to clean up the engine bay and extend the wiring harness so I could secure the connector in the slot on the eFan shroud. I had just zip-tied it to the radiator before inside the engine bay. I did this simultaneously with the activate shutter delete mod by removing all but the top and bottom fins.

Should make things even cooler, right?

However, after securing the connector into the eFan shroud, my temps have been regularly soaring up to 217-219* before the fan kicks on and brings it slowly down to ~196*. ECT hovers around the 203-205* while cruising now instead of 180s-190s, but shoots up as soon as I get on the gas. I’m wondering why? I even programmed the fan temp down further to 195*, but no change in engine temps.

Is the green spool thing on the connector some sort of thermometer? I would have thought the eFan activation would be dictated by ECT readings elsewhere through the pcm. Only guess is that it is much cooler inside the fan shroud where the connector/green spool thing is now than in the engine bay where it was zip-tied before? I’ll try programming the fan temp incrementally lower; hopefully it will be able to get and keep the ECTs back down to the range I was seeing before.

Any insights and suggestions are appreciated. Thanks in advance.

Some interesting issues. I wouldn't suspect several of the symptoms you mention to have anything to do with the cooling fan. If you are simply cruising down the road at say 55 mph the cooling fans usually aren't on anyway. So if before the engine coolant stayed at 180-190 cruising but now it's staying constant at 205 I would usually suspect something else is going on. The cooling fans are primarily there to force air through the radiator at low speeds and stop and go driving, versus there is a lot of air being forced through the radiator when driving 55 mph down the road.
You mention the shutter delete at the same time. Not that familiar with that system but make sure it isn't causing some issues.

As for the temp spike after modification i have no clue but you shouldnt have need to extend the harness there is videos and write ups of how to reroute the factory harness so that it will reach the e fan conversion i did the same conversion on mine a while back