Ok guys here's the story, my son bought a 99 Ford powerstroke with 6spd tranny, he has added a mild tuner, 6" stack and aftermarket intake and upon taking me for a ride I SWEAR his truck would EAT mine for lunch!
As you can see I have done a few things to my truck and currently at 105k I've noticed it just don't seem to have the power it used to.
Things I have noticed are EGT's getting warmer than usual as in during acceleration and having to wait longer to cool down before I shut down. I have also noticed it smoking more at higher (2800-3200) RPM's.
So my question,,, whats going on? Is my turbo laying down even though I can still see 33lbs boost or is it something else? I'm at a loss and I can't have my son kicking my

 

I guess I should has said that my truck is an 2002 Dodge Cummins but then everything is in my signature

 

Can Anybody help??