Pressurized engine

[Scoot5869]

(02-05-2026 )tree98 Wrote:  Sounds like a lot of blowby or bad valve seals. 20 psi shouldn't be leaking out like you described. Your losing boost out of those leaks!! That could explain your power loss.

Also check compressor like mentioned above.

I just changed the valve guide seals. truck really doesn’t use any oil except for the front structure but I just fixed that.
What other way can I check compressor to see if it’s bad?
I can fix things if I know how and this forum is a god send and quick serve!
I just don’t know how to diagnose things without researching
Thanks