Recent content by Nitsuj

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    IWE Vacuum Line Missing? Capped at supply and check valve?

    It has not. I drove it with the line/tube replaced for a day. I still had grinding when turning at a slow speed. Just like when driving in 4wd and turning sharply. I have been driving with the line removed. Same situation. Interestingly, in both situations, the grinding is more pronounced when...
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    IWE Vacuum Line Missing? Capped at supply and check valve?

    I do have more answers! See https://www.expeditionforum.com/threads/tsb-24-2188-2003-2020-expedition-navigator-f-150-4wd-grinding-clicking-ratcheting-noise-from-front-wheel-area-july-23-2024.56448/ So, yes the dealer capped the lines according to the TSB listed in the post above. They did not...
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    IWE Vacuum Line Missing? Capped at supply and check valve?

    I might have an answer for my own question. See https://www.blueovaltrucks.com/tech-articles/everything-you-wanted-to-know-about-the-iwe-system-and-then-some/ It states: If you suspect that your system is malfunctioning and you are not able to test it right away or want to drive and not damage...
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    IWE Vacuum Line Missing? Capped at supply and check valve?

    Hello All, 2017 Ford Expedition EL VIN Build date 12/16/16. One owner. I have read the forums, which have been very helpful. I am wondering if I am missing the vacuum line that contains the check valve (part number AL3Z-3A788-A)? I have the check valve, but it is capped on the bottom and...
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