Boost hesitation

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by The_firm, Mar 22, 2020.

  1. The_firm

    The_firm Bobtail Member

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    Nov 12, 2019
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    Hey guys I have a freightliner century 2007 14L and my boost just comes in very late about 8-10 seconds after changing into gear and also loses power at hills like crazy got a deleted EGR I have a new turbo all boots are new just don’t understand what’s causing the boost to kick in 10 seconds later
     
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  3. McMahons Trucking

    McMahons Trucking Light Load Member

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    Jul 4, 2018
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    Is it a variable gateway? Electronic or pressure activated?
     
  4. McMahons Trucking

    McMahons Trucking Light Load Member

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    Jul 4, 2018
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  5. The_firm

    The_firm Bobtail Member

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    Nov 12, 2019
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    14L Detroit
     
  6. McMahons Trucking

    McMahons Trucking Light Load Member

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    Sounds like a wastegate problem but hard to tel . Could be a sensor. I had a cat that did that and it was a boost sensor.
     
  7. The_firm

    The_firm Bobtail Member

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    Nov 12, 2019
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    What exactly was yours doing
     
  8. McMahons Trucking

    McMahons Trucking Light Load Member

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    It wouldn't do anything when i gave it throttle. Hesitate and then "kick in" and go. Other than that it ran fine. Idle normal etc...
     
  9. The_firm

    The_firm Bobtail Member

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    Nov 12, 2019
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    I’ll try the boost sensor see what happens how much other things did u try before boost sensor processes of elimination please
     
  10. McMahons Trucking

    McMahons Trucking Light Load Member

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    Jul 4, 2018
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    I actually had two codes. Atmospheric pressure sensor and the boost sensor. I changed the boost sensor and both codes went away.
     
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