Sluggish performance in my ole girl

If your pyro is running hot and you are not going upgraded loaded for it to run hot, I think you have a issue. What is your engine oil temperature telling you? What is your engine oil pressure doing?

Maybe overrich fuel, burning way too much for the required work. Did your fuel mileage go down the chute?

 

If turbo pressure is down it could be turbo or charged air cooler or a lose connection or clamp

 

Intercooler clamp would be a check as well. If you don't have a good seal on the air intake side to turbo, shes going to fall down and get sick.

 

If she is warmer on the Pyro check the air filters first. Then check for leaks on the pressure side of turbo, (CAC boots tubes etc.) Also give the turbo a real good look, it takes a huge leak to loose that much pressure

 

Seems like a big pressure loss. I agree with all on filter checks and air to air checks including the cooler itself. I would check turbo over well like @wore out said. Make sure your wastegate isn't opening at to low of pressure.

 

Very common this time of year to get salt mist from the highways if you are in snowy climates, then it dries and crystallizes to clog air filters. It dries the same colour as the filter paper, so hard to tell. Check for residue on the inside of air cleaner housing. After that, check for air to air leaks.