No power on lower settings. Spartan Tuned

[Jscc]

So a little history. Truck is a 08' job 3 that has been Spartan tuned since day one. 78000 miles now. Mostly run on 275.
I updated last spring to the new version 275 and all the tunes offered. When I did that I lost the EGRT? sensor for my exhaust temps. Well it took me a year to finally get around to sending them an email to get it working again.
So now I have the sensor back but it sounds as if the sensor is bad as it will not move in temps.
Now the problem. When I loaded the new config file and themes I loaded the 275 tune with it. I had been running the 210 tow tune prior to this. Everything was fine minus I cannot tell how hot the exhaust was.
Well I went back to the 210 tow tune and it had about half power. So I tried the 210 tow, the 210, stock dpf off, 150, and all of them are about 50% of power including the stock tune (let me tell you how fun that was to drive around)!
Everything looks fine as far as numbers are concerned but, when I bring up fuel load it says that it is asking for reduced power.
I then reloaded the 275 tune and she runs fine.
Any ideas to help me out?
Thanks ahead of time!

[SpartanDieselTech]

Its certainly the EGRTA sensor. Any tunes 210HP and below rely on the sensor for fueling control and will cut power substantially without a proper reading. Will be the same for a stock tune likewise.

Sensor swap should solve the problem for you.

[Jscc]

Awesome Matt thank you!

Did I mention that I pull up to 30k behind this truck and the tranny is still holding strong?
I have now doubled the miles both my Dodges Transmissions lasted pulling the same weight! Impressive tuning to say the least!

[08stroker250]

Awesome to hear on the transmission buddy! Glad to hear that you are satisfied.