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CAT Acert C7 Help

Discussion in 'Trucks [ Eighteen Wheelers ]' started by jlittle0018, Dec 31, 2015.

  1. Dec 31, 2015 #1
    jlittle0018

    jlittle0018 Bobtail Member

    18
    0
    Oct 13, 2015
    0
    When hard acceleration, my engine has been losing power and the check engine light will come on. The light will not stay on when you pull off the accelerator and put it back down.

    The only code the shop is saying is a 171-3 Ambient Temp Sensor voltage above normal. Would this effect the engine? That is the only code that is showing.
     
    jlittle0018, Dec 31, 2015
    jlittle0018, Dec 31, 2015
    #1
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  3. Dec 31, 2015 #2
    jlittle0018

    jlittle0018 Bobtail Member

    18
    0
    Oct 13, 2015
    0
    Codes from the cruise control are 58, 25 and 63.
     
    jlittle0018, Dec 31, 2015
    jlittle0018, Dec 31, 2015
    #2
  4. Dec 31, 2015 #3
    GrapeApe

    GrapeApe Road Train Member

    2,215
    2,211
    Jan 7, 2013
    0
    58 is a J1939 device issue
    25 is a boost pressure sensor issue
    63 is a low fuel pressure issue.

    You need Cat ET to know more. Without knowing the exact faults and counts, I'd be looking for a wiring issue at the boost pressure sensor and fuel pressure sensor.
     
    GrapeApe, Dec 31, 2015
    GrapeApe, Dec 31, 2015
    #3
  5. Dec 31, 2015 #4
    jlittle0018

    jlittle0018 Bobtail Member

    18
    0
    Oct 13, 2015
    0
    I had the truck to the shop today. They told the only code was the 171-3 which is the ambient air code. I checked these myself on the cruise control. They had to show in ET didn't they? I kinda question their ability. It is losing power when hard acceleration up hills mostly. Or if you get in the fuel real hard on flats. Where is the boost pressure sensor located on the C7's?
     
    jlittle0018, Dec 31, 2015
    jlittle0018, Dec 31, 2015
    #4
  7. Jan 1, 2016 #5
    T800H

    T800H Medium Load Member

    608
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    Apr 2, 2010
    The Keys
    0
    how old is the oil in it, if I'm not mistaking these are HEIU injectors and they need very clean oil to work right.
    a truck where I work was having the same issues as yours, I told them to change the oil before anything, problem fixed.
     
    T800H, Jan 1, 2016
    T800H, Jan 1, 2016
    #5
  8. Jan 1, 2016 #6
    jlittle0018

    jlittle0018 Bobtail Member

    18
    0
    Oct 13, 2015
    0
    They do have heui injectors. I'm going to try that. The oil looked thin the other day when I checked it. For some reason, the 25 code and 63 code is flashing up twice. Any ideas why on that?
     
    jlittle0018, Jan 1, 2016
    jlittle0018, Jan 1, 2016
    #6
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