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check fluid, and stop engine light probs.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by jerryp53, Mar 31, 2009.

  1. Mar 31, 2009 #1
    jerryp53

    jerryp53 Bobtail Member

    6
    1
    Mar 31, 2009
    molena, ga
    0
    i have a 93 whitegmc with a 12.7 detriot the check fluids light and the stop engine light will come on and the motor will act like it is going to shut down for just a second and then resume running as normal. this happens driving down the road, and at idle. the surge tank and the sensor on the coolant res. is new, as well as the ecm, and all the sensors and harnesses on the motor. any help will be appreciated:biggrin_25512:
     
    jerryp53, Mar 31, 2009
    jerryp53, Mar 31, 2009
    #1
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  3. Mar 31, 2009 #2
    05chopper

    05chopper Light Load Member

    169
    22
    Dec 25, 2008
    USA
    0
    Does the ECM know you have a low coolant sensor?
     
    05chopper, Mar 31, 2009
    05chopper, Mar 31, 2009
    #2
  4. Mar 31, 2009 #3
    jerryp53

    jerryp53 Bobtail Member

    6
    1
    Mar 31, 2009
    molena, ga
    0
    the sensor on the coolant res. hooks into the wiring harness that runs from the ecm to the inside of the truck on the left side of the firewall on the cab.
     
    jerryp53, Mar 31, 2009
    jerryp53, Mar 31, 2009
    #3
  5. Apr 1, 2009 #4
    Heavyd

    Heavyd Road Train Member

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    6,267
    Feb 4, 2009
    0
    ECM may be losing ignition or unswitched battery power. Usually if the ECM is programmed for shutdown on low coolant the Check Engine and Stop Engine lights will come on and stay on and the engine will shut down in 30 seconds. If the engine stumbles or seems to stutter or die when this happens it may be going through a reboot that happens at key on. Usually when you key on the ECM boots up and tests it self and turns on the Check and Stop engine lights in the dash for a bulb test. If this happens while running you will have symptoms that you describe. You will need to check the ECM for fault codes, and or check the power harness from the batteries to the ECM for any corrosion or bad connections. You truck may or may not have a diagnostic switch to retrieve fault codes. You may have to look around, usually under the steering column.
     
    Heavyd, Apr 1, 2009
    Heavyd, Apr 1, 2009
    #4
  7. Apr 2, 2009 #5
    Bigstretch

    Bigstretch Light Load Member

    161
    30
    Jun 14, 2008
    NW IL
    0
    Is the coolant level where it needs to be? If it is close, but not topped off, the coolant sloshing around will make and lose contact. Our T8's loves to do that.
     
    Bigstretch, Apr 2, 2009
    Bigstretch, Apr 2, 2009
    #5
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