Air purge valve purges intermittently

Discussion in 'Trucks [ Eighteen Wheelers ]' started by mitmaks, Oct 1, 2022.

  1. mitmaks

    mitmaks Road Train Member

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    I have '13 KW T660 Cummins isx15 and recently when I'm stopped and take off slowly it will "sneeze" several times intermittently. Ive replaced whole dryer assembly this spring and everything was fine until recently.
    At low speeds it will act like its grabbing brakes when it sneezes. What might cause this?
    TIA
     
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  3. AModelCat

    AModelCat Road Train Member

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    The fact you mention it acts like the brakes are grabbing would make me look at the traction control system. Sounds like its detecting wheel spin when wheels aren't actually slipping. Doubt its the purge valve on the dryer.
     
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  4. mitmaks

    mitmaks Road Train Member

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    Well on my truck if it detects wheel spin it will light up traction light and I have control button to off/auto/on full time for traction control.
    I notice when I get unloaded and trailer is empty and I start driving it will do same thing too but once I get on highway and speed up it goes away.
     
  5. Heavyd

    Heavyd Road Train Member

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    Hill start aid possibly.
     
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