Code P026D and split cold side CAC pipe

[krweatherl]

I have been seeing 22psi most of the time, but sometimes 23psi at elevation. I seem to remember seeing 25psi back in the day, but maybe I'm wrong on that? Can someone comment for sure?

I typically see 28-30 psi

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[CrazyCooter]

I typically see 28-30 psi

I appreciate that number for reference!

 

[Rusty PW]

I typically see 28-30 psi

I used to see those numbers.

 

[krweatherl]

I’m seeing a bunch of reports about these breaking/leaking, I’m at 33,000 , thinking I should get proactive about this and order the AFE Bladerunner kit.
We have a Fleet of 50 trucks at the rock products company I work for, the Mack Granites with the 465s regularly popped the flex hoses and broke clamps. The popped hoses would whistle loudly, the broke clamps would be a loud pop followed by no boost. Some of us drivers would carry a set of spare hoses and clamps, 5 minutes with a screwdriver and you were back on the road vs waiting for a service truck. Our Kenworth’s with C15 Cummins almost never have this problem.

 

[CrazyCooter]

Maybe I still have another leak that happens at higher pressures? I'll have to make some adapters/plugs and pressurize the system again with the smoke machine.

Hoping this isn't a combined issue with a turbo actuator failing!

 

[CrazyCooter]

So I've added some PIDs to the diag screen on OBD Fusion. Commanded VGT A Position, VGT turbo A Position, Commanded Boost Pressure A , and Boost Pressure A. So far everything is lining up within reason driving locally. Will be cool the check this while towing and under a sustained load.

The PID I'm using for a gauge is "Boost Psi" and again....21.9-22.1psi is what I'm seeing as the norm at my 500-700' elevation.

"Atmospheric pressure" is reading 14.4psi so that is consistent with my elevation.

 

[CrazyCooter]

Further testing this morning netted no leak that I could isolate at low pressure.

I plugged the exhaust pipe with a latex glove and put air/smoke into the turbo inlet pipe. Looks like a .025" leak which is pretty minute considering the exhaust system is included in this test?

There is definitely a leak at the fitting leaving the turbo to the hot side pipe indicated by the slight oil/dust collection under that fitting, but how much should be considered normal? I pulled the standoff bolt and wiggled the pipe, but was unable to see any smoke leaking. Possible its actually leaking at 20+ psi? The rubber hot side hose is definitely laying on the power steering pump and could be a future problem.....might have to get the hot side pipe next as preventive.....Only $654 retail for that pipe!

 

[rharr]

They all do that, mine is just like that.

 

[rharr]

might be an option
https://www.lazerlabcreations.com/eco-diesel/p/eco-diesel-turbo-outlet

The stupid spring clip design seems to be the issue, not sure why they could have just used a a hose clamp setup.

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