Seems slower than usual

[merc123]

I was towing about 4500 lbs. (and about 600 in the bed) and it seems a little more slower this week than last. I really had to watch the EGTs closely. The turbo stayed at 10 PSI mostly and tried to climb up to 15 to 20 pretty frequently. I wasn't uncommon to start up a moderate interstate grade at 70 MPH and it slow down to 55 unless I gave it alot of pedal input.

EGT was between 1000 and 1200, boost was 10 and trans was 150-160*. Boosting to 15 PSI would get me a 1200+ EGT so I'd let off the gas.

What could it be?

[Dietoremain]

check your up pipes and other places for a boost leak.

[merc123]

Don't see any.