Can You Bypass Def?

Discussion in 'Experienced Truckers' Advice' started by BigDog Trucker, May 8, 2020.

  1. BigDog Trucker

    BigDog Trucker Heavy Load Member

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    Is there a way to bypass def if the tank runs out and derates the engine? I was in the vovlo dump the other day, and by the end of the day the def needle was on empty. Luckily I never stopped the engine after it ran out, but after I went to the gas station to get diesel down the road from the yard, I had to limp back home at 5mph lol.
     
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  3. HillbillyDeluxeTruck

    HillbillyDeluxeTruck Road Train Member

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    Yea. We're not allowed to talk about it here. It's worse that cussing, lol.
     
  4. Numb

    Numb Crusty Curmudgeon

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    I always filled up before 1/4 tank.

    usually every 2 tank of fuel, whether it needed it or not.
     
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  5. BigDog Trucker

    BigDog Trucker Heavy Load Member

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    Dang enviro nazis.
     
  6. Mrlanza

    Mrlanza Light Load Member

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    Redstone Arsenal, Al
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    I've heard of people who made do by dumping their "iced tea" jugs into the tank. Haven't personally witnessed or talked with anyone who has claimed to do it themselves though, so your mileage may vary.
     
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  7. AModelCat

    AModelCat Road Train Member

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    I wouldn't put anything other than DEF in that tank. As of a couple model years ago there's an EPA mandate to have an actual quality sensor in the tank. Anything other than the correct concentration of DEF (give or take a couple percentage points either way) will throw a fault and possible derate.
     
  8. Chubby Fly

    Chubby Fly Medium Load Member

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  9. loudtom

    loudtom Road Train Member

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    Unplug the speed sensor and you can go faster than 5mph. There are a few downsides, though. Speedometer won't work, jakes won't work, my E-log won't switch to the drive line, and it won't let the turbo build more than like 10 PSI of boost since it's still derated. While loaded, the smallest of hills will slow you to a crawl, and you'll have trouble going much faster than 60 MPH.
     
  10. D.Tibbitt

    D.Tibbitt Road Train Member

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    U know, it is just much easier to put def in it everytime u fill up. If u get in the habit . U dont even think about it
     
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  11. Lumper Humper

    Lumper Humper Road Train Member

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    It’s a hard job doing what you’re supposed to.
     
    ncmickey, Coffey, COBB2070 and 6 others Thank this.
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