Air flow escaping at EGR Cooler connection to ex. Manifold

[wrench buster]

(08-20-2025 )Rawze Wrote:  

(08-20-2025 )wrench buster Wrote:  ...
The DPF was cleaned a couple of weeks ago. It is doing re-gens about every 10 hrs. according to Insite. Thanks for your reply. Let me know what to look for in the aftertreatment history if possible.

Was the DOC unit cleaned as well?.

How was the DPF cleaned?.

Did anyone bother to do a DPF replacement procedure in Insite when the clean one was installed?.

Was the Decomp tube inspected for clogging?.
info: https://rawze.com/forums/showthread.php?...07#pid1807

You said it was a new egr cooler.. is it an OEM unit?, or after-market?.

Does the turbo calm down when the DPF, temps etc. reach above 450-f so?.

What is the turbo position and engine rpm sitting at when its acting up?.

Thanks for your input, I came to find out the shop had the DPF cleaned, however the DOC was not. Come to find out the guy cleaned the DOC with a steam cleaner? Not a good idea. I removed the DOC yesterday and took it to get professionally cleaned. The guy told me it gets cleaned with hi air pressure (no chemicals) . I also noticed and he did too, that the engine is running rich and lots of soot on the inlet side of DPF. He said possible face plugging going on. There is a diffuser on the inlet side so I really could not see the actual DOC face material. I believe I am getting close to finding the cause of frequent regens and regen blinking lites. I now have a CAC coller test unit and going on the theory of over-fueling, lack of air causing excessive soot in the aftertreatment system. Let me know your thoughts and thanks again for your advice and I also am going to check the SCR diffuser for blockage.