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Caterpillar BXS Flash Code 94 289-7

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Smellfunny, Dec 11, 2015.

  1. Dec 11, 2015 #1
    Smellfunny

    Smellfunny Road Train Member

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    Code for intake valve actuator on #5. Code only pops on maybe 3 times a day. Front and rear Harness was replaced in 2013 but it does not have the little boot seals in the pigtail (I have new ends on the way). I replaced the solenoids and cleaned out the pigtails before I replace solenoids and after. When I run a intake valve actuator test there is zero change in engine sound when it gets to #5&6. When I run the IVA SOLENOID test it says ok on all. Thoughts?
     
    Last edited: Dec 11, 2015
    Smellfunny, Dec 11, 2015
    Smellfunny, Dec 11, 2015
    #1
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  3. Dec 11, 2015 #2
    GrapeApe

    GrapeApe Road Train Member

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    With an FMI 7 it is "not responding". Than means electrically it seems OK to the ECM, that is why it passes the solenoid test. Not responding could be out of adjustment, or it may have a bad seal not letting oil pressure open them. I haven't seen a cracked IVA housing on a BXS yet, very common on MXS & NXS though. It could even be dirt or something stuck in the piston that opens the intake valves.

    Make sure the O-rings are OK going to the IVA housings. If I remember right, they have a thick o-ring that can harden and crack causing an oil leak under the valve cover, that would make it not respond.
     
    GrapeApe, Dec 11, 2015
    GrapeApe, Dec 11, 2015
    #2
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  4. Dec 14, 2015 #3
    Smellfunny

    Smellfunny Road Train Member

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    Ok another trip under the cover and I found the issue (99% sure). The nut on #5 intake valve adjuster was gone. I installed a new nut and adjusted valve and IVA on #5 and he is going to run it and see what happens.
     

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    Smellfunny, Dec 14, 2015
    Smellfunny, Dec 14, 2015
    #3
  5. Dec 15, 2015 #4
    GrapeApe

    GrapeApe Road Train Member

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    That could certainly do it. Did you find the missing nut?
     
    GrapeApe, Dec 15, 2015
    GrapeApe, Dec 15, 2015
    #4
  7. Dec 15, 2015 #5
    Smellfunny

    Smellfunny Road Train Member

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    Jan 28, 2012
    South Carolina
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    Nope
     
    Smellfunny, Dec 15, 2015
    Smellfunny, Dec 15, 2015
    #5
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