3406E warms up looses boost ?

[Heavyhauler]

My 3406E series cat runs like a dream. when the truck warms up on warm days it seems to loose boost and struggle and become lazy per se. On a chilly winter day she will pull like a freight train because the fuel is in fact cooler. live dated says all the injectors are good, brand new fuel lines start to finish , return lines included ( from cat) new fuel filter housing , filter as well. New primer and Heui pump. Checked the Turbo center bering seems fine, new turbo charge cooler , all hoses and clamps. Really blown my brains out. Ive done 90,000 miles since all repairs. runs every day just about 5 days a week steady. Hasn't gotten better or worse. no check engine lights .... ever. indicator light works, data communication is complete with live data scanner with no indication of current or historical codes.

Could the ECM have an issue in reading temp of fuel/truck/engine/ and not throw a code because it can't self identify? Im still chasing this mystery. (30,000 hours on ECM)

I feel like if I put an after market fuel cooler it would help but still wouldn't be a proper repair.