Cummins X15 - How to check fuel restriction and test for air in fuel (aeration) Cummins CODE 559
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- čas přidán 13. 09. 2024
- This cummins engine would run rough and shut down intermittently on the customer.
I performed a fuel restriction and aeration test after seeing code 559 for low fuel pressure in the fuel rail.
Found a lot of air being sucked into the fuel system.
Ended up being a bad fitting.
Thank you for your videos. Good job. Have a great day.
where was it sucking air from? great video thanks
@@juanavila1611 thanks! It was coming from the line between hp pump and fuel module. Had a small split in it.
Dealing with this right now, my gauge read -25 HG gonna see whats causing it tomorrow
What did you end up finding?
What i found was what appeared to be paper towel jammed up inside the thermo recirculation valve, had me pretty stumped for a bit because everything tested good, i pulled the line off and saw a bunch of brown paper towel jammed up inside. I work at a peterbilt dealer and the truck came back 3 times for the same 559 code.
@@ryanm6027 Great find!
How do you know how much solubilized oxygen and dissolved air is in the diesel fuel?
@@ox-cetane4887 you see how much bubbles are coming from the line. There should be none. It should run clear.
@@AcousticHills Indeed, ULSD has significant problems with fuel oxidation and air contamination in the ULSD itself and nobody is talking about it.