Advice Needed

Discussion in 'Ask An Owner Operator' started by Rookie2020, Sep 10, 2021.

  1. Sep 10, 2021 #1
    Rookie2020

    Rookie2020 Bobtail Member

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    Hello to all of the truck drivers out there.
    I would like your advice, help on how to find the problem on my truck, and any suggestions would be welcomed..
    The problem:
    I have a 2005 Freghtliner Century with a DD 60 series and today it gave me these issues:
    The temperature goes high, coolant level is fine.
    Low oil pressure, oil level is fine.
    Voltmeter gauge says almost 16.
    RPM Needle drops too quick to 600 and it does not let me change the gears. I have to double tap it in order to change it.
    It does not have the right power to pull forward when I try to accelerate on highway.
    All these things came up today and I do not know what to do.
    I have spent so much in this truck by fixing the problems, but the more I fix and pay the more those come up.
    I cannot go on the long deliveries because I am afraid that I might get stuck out there.
     
    Rookie2020, Sep 10, 2021
    Rookie2020, Sep 10, 2021
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  3. Sep 11, 2021 #2
    truckdriver31

    truckdriver31 Road Train Member

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    maybe the key switch
     
    truckdriver31, Sep 11, 2021
    truckdriver31, Sep 11, 2021
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  4. Sep 11, 2021 #3
    Spyro2112

    Spyro2112 Medium Load Member

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    Ecm problem
     
    Spyro2112, Sep 11, 2021
    Spyro2112, Sep 11, 2021
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  5. Sep 11, 2021 #4
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    I'd address the 16 volts your voltmeter is showing before attempting to diagnose anything else. Verify at the alternator, then at each battery.

    I would assume a battery cable issue first, which could definitely cause other faults to appear.
     
    Big Road Skateboard, Sep 11, 2021
    Big Road Skateboard, Sep 11, 2021
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  7. Sep 11, 2021 #5
    truckdriver31

    truckdriver31 Road Train Member

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    matter of fact. you have a ecm wire going to the battery. has a fuse in line with it
     
    truckdriver31, Sep 11, 2021
    truckdriver31, Sep 11, 2021
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  8. Sep 11, 2021 #6
    Ridgeline

    Ridgeline Road Train Member

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    Check your grounds.

    this will cause problems like this.
     
    Ridgeline, Sep 11, 2021
    Ridgeline, Sep 11, 2021
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  9. Sep 11, 2021 #7
    ProfessionalNoticer

    ProfessionalNoticer Road Train Member

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    Sounds like it's derating from something grounding out. Find a good electrical tech.
     
    ProfessionalNoticer, Sep 11, 2021
    ProfessionalNoticer, Sep 11, 2021
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  10. Sep 11, 2021 #8
    mudflap77

    mudflap77 Heavy Load Member

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    Check and see if the alternator is actually putting out 16V. Simple test with a voltmeter. Red lead on the B+ black lead to a good clean ground, if it is putting out 16V the regulator in the alternator is screwing up. Replace the alt. I had a similar issue a few years ago on a Cat. When you start getting up over 15V you are above the voltage operating range for the ECM and will get funny reading or shut down.
    Clean up the grounds regardless if the alternator is the cause or not.
     
    mudflap77, Sep 11, 2021
    mudflap77, Sep 11, 2021
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