CAT C13 ACERT KCB LOW POWER AFTER REBUILD

hey ya'll,
recently rebuilt a KCB C13 acert with an eaton autoshift, started up great and runs fine, put in all new injectors and got both turbos checked out at Cat and they came back fine. it runs okay as it should but uphill it doesnt exactly struggle but it just doesn't seem to have the power it used a long while back it was lazy before the rebuild also, uphill and the speed comes back down to 40 to 45 with a very light load, im not sure what the problem could be, we've changed everything as far power is concerned, im not sure what else we could do to get it back to it's former glory, an ecu tune maybe? idk, any thoughts?

 

we've had it running for over a month so i think it broke in earlier before the cold set in, im in California also so too cold weather aint really a problem

 

I apologize for that, so yes I guess it was rubbing

I apologize for that so yeah I guess it was running good and then slowly lost its power I don't have a fuel pressure gauge on the truck but I'll connect my computer and take a look, there doesn't seem to be lag and the turbos spool up fine

 

what psi should i be looking for

 

uhh nope, i know two of the VVAs were changed last year, there are no VVA codes and it idles fine at cold temperature