Ok, this will be long and vague, so pay attention.
I was at a customers jobsite working on a forklift with an electrical problem. My customer started asking some questions about a lift that was previously fixed by an ex-mechanic of ours last year. The Ex-mechanic was suppose to be more of a "Diesel Engine Guy", where I am more towards small engines/ gasoline, electrical, and fabricating.. Forgive me, I didn't take note of the make, model of the lift in question. It does have a Cummins (with a Holset turbo that would fit nicely on my 89 Turbo Caravan- 5 speed..blah blah blah) Now the engine had a knock, our mech went through and checked the bearings n such and found nothing wrong. My customer said it sounded like it was in the upper end almost like detonation. My customer found a plate wheere the air comes from the turbo and goes through [this plate] and also houses a heater. Now this plate has 2 broken bolts, which then is obviously creating a boost leak..
Could this boost leak richen up the fuel enough to raise the EGTs and cause DET at idle??
I know this was vague, so if you need more info please ask... I don't have a lot more but ask anyway.lol