No compression in Cylinders 4, 5 and 6 Help

Discussion in 'Ask An Owner Operator' started by AFC, Jan 2, 2024.

  1. AFC

    AFC Heavy Load Member

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    Jan 1, 2024
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    Hey Guys,

    This is my first post hope I'm not breaking any etiquette.

    My batteries died and only way to start my truck up 2019 Freightliner Cascadia DD15 was by using some starter fluid.

    Took my truck to dealership and they said I need 8 new batteries. I said fine, my truck has an EPU

    They ran a compression test and said that I have major problems. Please see picture of compression test.

    1 month ago I had my valve adjusted...this is added information.

    My truck drives fine, I don't see the loss of power. I haven't seen if it needs ether to start up since I just got the batteries.

    I'm in New Mexico and my leased onto company is in Chicago. My company said bring it in ASAP and we will figure it out.

    Any advice would be helpful.
     

    Attached Files:

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  3. Animosus

    Animosus Heavy Load Member

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    0% you would notice. Need to verify doing a manual compression test not a relative. Was this performed before the new batteries were installed? Bad batteries can throw off a relative compression test since it uses cranking speed differences.
     
  4. AFC

    AFC Heavy Load Member

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    I don't know if it was done before or after. It was done same day
     
    Rideandrepair Thanks this.
  5. AFC

    AFC Heavy Load Member

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    From the times posted on the test, it was done after the new batteries were installed. Here's another picture of the dealer report
     

    Attached Files:

    Rideandrepair Thanks this.
  6. Magoo1968

    Magoo1968 Road Train Member

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    It would be smoking like crazy if half the cylinders were zero compression. Dpf would plug instantly as well. Unless ether damaged it I would definitely test drive it before doing a rebuild.
     
  7. AFC

    AFC Heavy Load Member

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    Jan 1, 2024
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    Thank you Magoo1968. I will monitor it and see if anything changes. I'm trying to get an oversized load from Utah to Arkansas then I plan on deadheading to Chicago for closure
     
    Rideandrepair Thanks this.
  8. abyliks

    abyliks Road Train Member

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    Throw it on a Dyno
     
    CruzControhl2 and Rideandrepair Thank this.
  9. AFC

    AFC Heavy Load Member

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    I will be doing it all. I just need confirmation that I can go a few thousand miles without issues. Even if that means keeping my truck running until I get to my mechanic shop. No smoke except this morning when I jumped the truck and used starter fluid. Runs good.
     
    Rideandrepair and 77fib77 Thank this.
  10. SmallPackage

    SmallPackage Road Train Member

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    Marion Texas
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    To have the rear 3 cylinders be dead like that back in the day one would think it be either a broke cam or broke crank, but i guess a computer could technically keep something that broke running nowadays. 3 dead with half the cylinders dead that engine should be shaking that truck apart at idle and fighting to keep itself running even if you manage to get it started. One would think anyway.
     
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