Isx cm 870

[Eeldredge]

I have an 06 ISX 15 cm870 that had and egr failure. It was running fine other than lag off the line. Once spooled up it hauls. Got home and sure enough the egr was 1/8” open. Chipped tooth on actuator. Had a highly recommended guy electronically evaporate the egr. I performed the mechanical process myself. 100% blocked on hot and cold side. They installed the program that he said is factory program. He had me unplug all egr sensors. When I went to test it, it is only running at approximately 50% power. No check engine light. Load max’s at 53%, boost and fuel are about half of what it was before the program. He said it had to be a boost leak and it was derating. Sure enough I found crack in intercooler weld. Repaired that, all new boots, new Intake pressure sensor, held 30psi for 2 hours and 50psi short time test. NO leaks. But it’s still half power. Do I have to reset the ECM somehow or is it his programming?
Engine only has 115,000 miles. Fuel is good, turbo actuator is operating, no restriction’s in intake side. Turbo is smooth and no play. Turbo was making 29psi with the egr and boost leak (ruling out turbo issues). It ran great with the boost leak and egr stuck open. Only change is egr blocked and program. He said they install the latest Cummins updated software. I thought that maybe the old program didn’t detect the boost leak and the updated software did was the reason for it derating.

I’m supposed to be in CO to work but don’t want to push it pulling passes like this. Any help would be appreciated.