Turbo problems

[Mikesuburban1]

Sooo 07 IH 7600. Cummins ism 425v. Egr motor no dpf. Lately truck has been sluggish like struggleing when starting from a stop almost like it has no bottem end power and wont make full boost till 1600 rpm and egts are around 1000. With jakes on it would boost up to 25psi now its around 12-20psi. Also i hear a ticking noise like a exhaust manifold leak but i cannot see any soot or smelll exhaust. The turbo and egr valve are new only 5k on them but i already had to replace the actuator on the turbo. Could the turbo be my problem? Could it be making the ticking noise i hear? I know this is a isx forum but i think they use the same turbo