Hello new to forum but have read through extensively I have an 05 f 250 mostly stock other than bullet proof egr cooler and upgraded oil cooler I'm very well versed with many of the 6.0 problems as I was involved in the court case I'm on my third turbo and having problems with boost I've changed ebp sensor and didn't change anything the truck has erratic boost hot cold when ever sometimes none sometimes 25 then just drops out I I yanked turbo and cleaned shutter veins as I have read a lot about that today I put in a new actuator ran perfect for 50 miles and then no boost at all it was a echlin I put in not a garret do these things really go bad that frequently? Could I have gotten a bad one? Or is there anything that possibly cooked the thing electronically from another source (map sensor) or any other place?