Cummins engine not enough boost

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Richard52, Feb 18, 2014.

  1. Richard52

    Richard52 Bobtail Member

    1
    0
    Feb 18, 2014
    I have an ISX 550 Cummins engine. It is not getting enough boost. Only about 12 pounds of pressure. I found a crack in the air to air charger and replaced it. Still not getting enough. Any ideas?
     
  2. bgxpress2006

    bgxpress2006 Light Load Member

    246
    68
    May 25, 2013
    Montreal, Quebec
    did you check your rubber boots going to the air to air
     
  3. manasteel

    manasteel Light Load Member

    124
    30
    Sep 10, 2012
    check the hose at the air compressor intake. it will rip on the back side
     
  4. Rig Wrench

    Rig Wrench Medium Load Member

    397
    61
    Dec 24, 2010
    northeast
    Check the map sensor, prolly packed full of carbon. Check the exhaust back pressure sensor on the thermostat housing too. Also may need to run a turbo test through insite. If the vanes are sticking it may cause this issue too
     
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