BXS boost question

Discussion in 'Trucks [ Eighteen Wheelers ]' started by NW can man, Mar 20, 2014.

  1. Mar 20, 2014 #1
    NW can man

    NW can man Light Load Member

    51
    9
    Apr 4, 2012
    Zillah WA
    0
    Have a 2004 W900 with a bxs cat in it and it has started to do something weird with the boost. In a pull or grade everything is fine but when we get on the flat ground and want to maintain 1200-1500 rpm the boost will pulse from 10-40 psi. Not all the time but it has started to more recently. Anyone else ever had this happen? No check engine light

    Thanks
     
    NW can man, Mar 20, 2014
    NW can man, Mar 20, 2014
    #1
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  3. Apr 22, 2014 #2
    anselmo garza

    anselmo garza Bobtail Member

    12
    1
    Feb 10, 2013
    0
    Mine.is.doing.the same thing .It will sit at 30 -35 for a while then it will go back to 40-45
     
    anselmo garza, Apr 22, 2014
    anselmo garza, Apr 22, 2014
    #2
  4. Apr 22, 2014 #3
    NW can man

    NW can man Light Load Member

    51
    9
    Apr 4, 2012
    Zillah WA
    0
    I found out mine was a faulty TPS. Take your off and see if dirt or grime has gotten in it. I was able to clean mine and put it back on work great now.
     
    NW can man, Apr 22, 2014
    NW can man, Apr 22, 2014
    #3
  5. Apr 22, 2014 #4
    anselmo garza

    anselmo garza Bobtail Member

    12
    1
    Feb 10, 2013
    0
    Whats a TPS and were is.it located on the engine? I need to try it.
     
    anselmo garza, Apr 22, 2014
    anselmo garza, Apr 22, 2014
    #4
  7. Apr 22, 2014 #5
    NW can man

    NW can man Light Load Member

    51
    9
    Apr 4, 2012
    Zillah WA
    0
    It is the Throttle Positioning Sensor and it is mounted on the bottom the the throttle pedal. It is a little square box with 3 or 4 screws holding it on. Take those screws out and it will pop right off.
     
    NW can man, Apr 22, 2014
    NW can man, Apr 22, 2014
    #5
    razor1983 Thanks this.
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