X15 chuffing through air cleaners at low rpm on jake brake

[Rawze]

(01-28-2024 )Jakt2016 Wrote:  It makes about 31 to 32 psi. Pulling hard.

I'm not sure exactly on the boost when it starts. Seems the one time I caught it it was about 20 psi. When it started. That's in the 3rd stage.
Imap I put in new 170k ago and cleaned it 60k ago.
The back pressure I put in new 170k ago. But haven't cleaned.
Factory cac.
Turbo is {aftermarket}. Yes I know I should of went cummins. Wish I could have.

== 31,32 psi is ok for that model engine.

== 20-psi during enigne brake is ok for on that model engine.


It could be the turbo itself or some other restriction somewhere.

And just to clarify.. what are you calling 'chuffing'?... and are you sure its the turbo doing this?.

Has anyone checked to ensure the engine passes an injector leak-down test?. - It could be a leaky injector causing the engine brake to stutter like that.
(injector leak test procedure): http://rawze.com/forums/showthread.php?t...3#pid75483