BXS Cat shutting off

Discussion in 'Peterbilt Forum' started by big_dog_trucker, Jan 12, 2016.

  1. Jan 12, 2016 #1
    big_dog_trucker

    big_dog_trucker Bobtail Member

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    Jan 12, 2016
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    I have a BXS cat motor in a 2005 379 Peterbilt, and it is randomly shutting down. It may be 2 hours or 1 month apart. There does not seem to be a pattern except that usually the oil light comes on right before it shuts down, but the oil light does not always come on. It will immediately crank up again with the key even while going down the road. (This truck does have a bully dog on it).
     
    big_dog_trucker, Jan 12, 2016
    big_dog_trucker, Jan 12, 2016
    #1
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  3. Jan 12, 2016 #2
    062

    062 Road Train Member

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    Make sure the ECM hot and ground are good.
    Have you tried unplugging the bullydog?
     
    062, Jan 12, 2016
    062, Jan 12, 2016
    #2
  4. Jan 12, 2016 #3
    big_dog_trucker

    big_dog_trucker Bobtail Member

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    Jan 12, 2016
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    Thanks for the tip. I will try unplugging the bullydog, and I will make sure the ECM hot and ground are good.
     
    big_dog_trucker, Jan 12, 2016
    big_dog_trucker, Jan 12, 2016
    #3
  5. Jan 12, 2016 #4
    magoo68

    magoo68 Road Train Member

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    Oil pressure shutdown in ecm on?? If so it might be bad connection to sending unit
     
    magoo68, Jan 12, 2016
    magoo68, Jan 12, 2016
    #4
  7. Jan 12, 2016 #5
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    If power/ground to ECM check out then I will bet ECM bad. Doing this for a long time and ECM replacement is always the last resort. I am only jumping to conclusion because in the last month I have had 3 bad BXS units in shop. All were original from 2005-06. All were intermittent exactly like yours. Cat's seem to exhibit intermittent problems instead of like the others that just die completely. In all seriousness, check everything well before replacing.
     
    QUALITYTRUCK, Jan 12, 2016
    QUALITYTRUCK, Jan 12, 2016
    #5
  8. Jan 12, 2016 #6
    big_dog_trucker

    big_dog_trucker Bobtail Member

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    Jan 12, 2016
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    I am checking on the oil pressure sensor now. I cleaned the ECM connections, firewall connections, and the battery connections. Thanks for letting me know about the ECM; I will let ya'll know how it turns out.
     
    big_dog_trucker, Jan 12, 2016
    big_dog_trucker, Jan 12, 2016
    #6
  9. Jan 13, 2016 #7
    josh polk

    josh polk Light Load Member

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    Bowie TX
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    One of my trucks done the same thing in ND
    I started the truck pulled the hood over and started wiggling wires till I found it
    It was on the driver side right above starter on inside of frame rail at that fuse block
    Good luck
     
    josh polk, Jan 13, 2016
    josh polk, Jan 13, 2016
    #7
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