Cummins low power and boost

[Toolatenow]

So..... I paid someone to fix the previous bad delete. They quickly stated that the delete was not proper and was a copy/past bs program that would probably work for a pickup but was horrible for this isx. Truck seems alot better but now have different issues. When turbo boost is at 15+ for 5seconds I get a CEL until it drops below 15 for 5sec. They added an egr block off plate before this started and I've already replaced the sensor on the intake so i thought I'd try to run without the plate to see if it improved...there is green liquid that looks like coolant and the pipe is full of it but my coolant is red. Is this normal? Any ideas on the light?
Thank you