Hello every one. Sorry if this ends up in the wrong place, or it’s been posted before. I have a basically stock 97 12 valve that I cannot figure out. Couple weeks ago it started struggling to get up some hills with my truck bed camper on. I didn’t notice it before, but now it’s getting annoying when the mini van soccer mom mean mugs when she passes me. The truck seems to do fine on flat but I end up shifting between 4th and 5th pulling the hills. Just won’t hold the boost in 5th and 4th runs out. Replaced waste gate,fuel filter, cleaned pre screen, new afc hose, torktek overflow valve. And checked fuel pressure 20ish at idle 32 at 2500rpm. No boost leaks that I can find. and no air in fuel. Other then dropping the tank and checking for blockage I don’t know what to do.