2019 cascadia bogs down and drops 2 gears for no reason.

Discussion in 'Ask An Owner Operator' started by Texasrig, Jul 20, 2022.

  1. Texasrig

    Texasrig Light Load Member

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    Dd15 w/ dt12 transmission.
    I’m having an issue that neither me nor the mechanic can figure out. When I’m driving the truck will bog down lose about 500 rpms and drop 2 gears for no reason. This only lasts for 2-5 seconds and then it’s back running fine again. Any ideas?? It’s not throwing codes and I’m fairly sure it’s not a transmission issue, I’m thinking computer related. Mechanic drove it for 35 mins and the truck drove just fine the whole time. ????
     
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  3. Siinman

    Siinman Road Train Member

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    Air in the fuel?
     
  4. 77fib77

    77fib77 Road Train Member

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    How many miles? Check a the battery connections to start. Get a socket in there and make sure they are tight.
     
  5. armo

    armo Light Load Member

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    Jun 16, 2022
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    it happens evevy day
    why no reason? there is a reason! regen started ...
     
  6. Texasrig

    Texasrig Light Load Member

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    472,000 miles
     
  7. Texasrig

    Texasrig Light Load Member

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    Yes everyday but real qucik. Doesn’t need a regen
     
  8. armo

    armo Light Load Member

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    what i think that asymmetric fuel injection is causing it.
     
  9. Texasrig

    Texasrig Light Load Member

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    I’m getting a code for engine fuel 1 injector metering rail 1 pressure. Do you think this would cause irregular shifting
     
  10. armo

    armo Light Load Member

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    the code must be in spn xxxx fmi xx format.
     
  11. Texasrig

    Texasrig Light Load Member

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    Spn-157. No fmi
     
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