LouLawrence wrote:
Last I looked you cannot use Sea Foam on a diesel engine (and why would you want to?).
I am guessing this is a turbo issue and the OP should be pursuing that avenue. Boost sensor possibly, cracked manifold or something similar.
Maybe you looked a long time ago.
https://seafoamworks.com/uploads/2018/12/HOW2_Adding-Sea-Foam-to-Gas-and-Diesel-Fuel.pdfI don't know if he should pursue your guess or not given your guess about Sea Foam. Joking ... kind of.
In any case, why do you think the air filter change helped?