2007 Pete 387 with ISX NEED HELP

Discussion in 'Peterbilt Forum' started by J-Trucker87, Jun 19, 2012.

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  1. J-Trucker87

    J-Trucker87 Bobtail Member

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    No only when water get to 240 light comes on ever time it need boost..
     
    J-Trucker87, Jul 1, 2012
    #11
  2. larry2903

    larry2903 Heavy Load Member

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    Thermostats is my best guess. Good luck J-Trucker.
     
    larry2903, Jul 1, 2012
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  3. J-Trucker87

    J-Trucker87 Bobtail Member

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    Well I will update u what we find out.. Will that make me lose power?
     
    J-Trucker87, Jul 1, 2012
    #13
  4. J-Trucker87

    J-Trucker87 Bobtail Member

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    Well got it back and Thermostats and bad and radiator cap was bad as well. So runs good now but need to take back and see what code is coming up because the engine light come on and off sometimes but I do not lose power. Dose anyone know how ofter fan turns on and off when park?
     
    J-Trucker87, Jul 4, 2012
    #14
  5. larry2903

    larry2903 Heavy Load Member

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    Fan cycling depends on wether or not a/c is on. A/C will make fan cycle regularly.
     
    larry2903, Jul 5, 2012
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  6. J-Trucker87

    J-Trucker87 Bobtail Member

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    Ok thanks when park at night should I keep fan on all the time or let it cycle?
     
    J-Trucker87, Jul 5, 2012
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  7. larry2903

    larry2903 Heavy Load Member

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    Do you idle the engine up or let it idle at low rpm's?
     
    larry2903, Jul 5, 2012
    #17
  8. J-Trucker87

    J-Trucker87 Bobtail Member

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    It at 800 rpm just so my truck will not turn off
     
    J-Trucker87, Jul 5, 2012
    #18
  9. larry2903

    larry2903 Heavy Load Member

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    I would leave the fan on all the time just because at that rpm the fan is pretty loud. Leaving the fan on all the time at least allows you to get used to the same constant sound.
     
    larry2903, Jul 5, 2012
    #19
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