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2013 maxforce 13 low power

Discussion in 'International Forum' started by mwilly, Jan 30, 2019.

Page 1 of 5
  1. Jan 30, 2019 #1
    mwilly

    mwilly Bobtail Member

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    Dec 13, 2018
    0
    My fuel pressure's all look good, My desired manifold pressure is 45 And I'm only delivering 32, Any ideas out There
     
    mwilly, Jan 30, 2019
    mwilly, Jan 30, 2019
    #1
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  3. Jan 30, 2019 #2
    Heavyd

    Heavyd Road Train Member

    7,625
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    Feb 4, 2009
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    Usually lazy boost is caused from plugged up DPF. If you have a scan tool there, can it read turbo charger 2 outlet pressure or exhaust back pressure along with DPF differential pressure? Max allowable exhaust back pressure is 5 psi and DPFs with more than about 1 psi are considered plugged up. If those pressure look good, then maybe you just need a new air filter, or time to check for air to air leaks.
     
    Heavyd, Jan 30, 2019
    Heavyd, Jan 30, 2019
    #2
    mojo2010 Thanks this.
  4. Jan 30, 2019 #3
    mwilly

    mwilly Bobtail Member

    19
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    Dec 13, 2018
    0
    Rechecked manifold pressure under full load, desired 36 actual 35,
     
    mwilly, Jan 30, 2019
    mwilly, Jan 30, 2019
    #3
  5. Jan 30, 2019 #4
    mwilly

    mwilly Bobtail Member

    19
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    Dec 13, 2018
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    I have ned
     
    mwilly, Jan 30, 2019
    mwilly, Jan 30, 2019
    #4
  7. Jan 30, 2019 #5
    mwilly

    mwilly Bobtail Member

    19
    0
    Dec 13, 2018
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    Dpf diff pressure is okay
     
    mwilly, Jan 30, 2019
    mwilly, Jan 30, 2019
    #5
  8. Jan 31, 2019 #6
    kubasj05

    kubasj05 Light Load Member

    148
    57
    Apr 18, 2013
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    Did you check fuel pressure by any chance? If your boost pressure is good, you may have fuel delivery issue/s.
    Any fault codes at all?
     
    kubasj05, Jan 31, 2019
    kubasj05, Jan 31, 2019
    #6
  9. Jan 31, 2019 #7
    mwilly

    mwilly Bobtail Member

    19
    0
    Dec 13, 2018
    0
    Fuel pressures look good, changed fuel filters, it feels like a plugged filter, rings smooth, no smoke, it has an active egr communication code this morning, will egr cause a derate
     
    mwilly, Jan 31, 2019
    mwilly, Jan 31, 2019
    #7
  10. Jan 31, 2019 #8
    kubasj05

    kubasj05 Light Load Member

    148
    57
    Apr 18, 2013
    0
    I believe yes as it is a part of emission stuff. If you have air and fuel and no other codes except for egr communication issue, I'd be leaning towards resolving that very issue first. Did you try to command egr any movement open/close, if so did you succeed or not. Asking this to determine if your egr communication problem is intermediate or continuous.
    Heavyd can can chime in a lot more on this subject
     
    kubasj05, Jan 31, 2019
    kubasj05, Jan 31, 2019
    #8
  11. Jan 31, 2019 #9
    mwilly

    mwilly Bobtail Member

    19
    0
    Dec 13, 2018
    0
    How can I see in ned if it's derated?
     
    mwilly, Jan 31, 2019
    mwilly, Jan 31, 2019
    #9
  12. Jan 31, 2019 #10
    mwilly

    mwilly Bobtail Member

    19
    0
    Dec 13, 2018
    0
    I ran the air test and I think I seen it, the code is a 2791
     
    mwilly, Jan 31, 2019
    mwilly, Jan 31, 2019
    #10
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