Rufous

{
  "post": {
    "title": "Air handling performance test",
    "selftext": "Hey Reddit,\n\nI have a '19 Peterbilt 337 that currently has active codes 3389 and 3361, ESN-74323240. Troubleshooting steps from Insite requests that I perform the \"Air Handling Performance Test\". \n\nWhile in Insite I am unable to locate the Air handling Performance test under the \"ECM Diagnostic Tests\" tab. Would this test be located there or am I just looking in the wrong place?\n\nAny guidance would be appreciated, Thanks!",
    "url": "https://www.reddit.com/r/DieselTechs/comments/1gaudi5/air_handling_performance_test/"
  },
  "comments": [
    {
      "body": "When you first connect to Insite, before creating an image a pop up box will inform you of an ecm calibration update available. Click the calibration history option and there will be info on all available calibrations and what comes along with them. If your diag requires the air handling test, there is most likely an ecm calibration to download."
    },
    {
      "body": "Is the ECM up to date?",
      "replies": [
        {
          "body": "I'm not sure how to verify if it is up to date currently, Would updating the ECM just be following this procedure I found? https://insite.cummins.com/Files/ECM_Calibration_Download_instructions.pdf"
        }
      ]
    },
    {
      "body": "IIRC, I think if you check your EGR differential ports, you’re likely to find your culprit for these codes",
      "replies": [
        {
          "body": "Most common issue on little Cummins."
        }
      ]
    },
    {
      "body": "Ecm needs to be updated to allow the test. Onsite only shows the tests applicable to the trucks current calibration. Be warned that updating the ecm will most likely clear the codes so be sure you have them all written down."
    },
    {
      "body": "Make sure you save an ECM template before you update. Otherwise if it fails you're gonna be in a world of hurt."
    },
    {
      "body": "Take off the intake connection and ram a piece of coat hanger through the EGR differential pressure sensor drillings, they’re plugged with soot.  The one behind the little hex head plug is usually really bad, carb cleaner helps."
    },
    {
      "body": "You would need to update the ECM Calibration in order for the ecm to have that test."
    }
  ]
}