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electrical plague 12volt system, alternating current leakage?

Discussion in 'Hybrid General Discussion' started by BG1988, Mar 14, 2020.

  1. BG1988

    BG1988 Full Access Member

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    still having a bit of an issue with the 12volt system
    I was only getting 14.3 at the tap it was causing the transmission not to move in drive (also shuttering if it worked ) (worked in M4).. other wise it would sit there (you can revv up your engines)


    i did resit the connections and tighten the crimps as they were coming apart again..

    (i bought new cables just not put in yet) as i think the battery is moving around causing the crimps to come apart..

    anyways after doing that everything is close to what it should be 14.9v is the actual factory cold start voltage preset..


    it was jumping around from 14.6 to 14.8 at about 60Hz ripple (you can see the OBD reader reading rapidly refreshing and moving all over the place)


    but everything seems to work now it does shutter slightly.. on cold start only (only does it once)


    the SUV shifts smoothly now,, threw out the gears.. before it was playing dead in drive gear (and no autostop)


    the engine idle is in sync with the voltage ripple so the engine idle has a ripple as well to go with it... it also has the funky rhythmic idle to go with it
     
    Last edited: Mar 14, 2020
  2. gooffeyguy

    gooffeyguy Full Access Member

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    Where did you throw the gears out to?

    2001 Yukon SLT
    2012 Yukon Denali XL
    2011 Yukon Denali RIP 5/20/18
     
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  3. BG1988

    BG1988 Full Access Member

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    haha should have been thru out the 4 gear(s), and/or sun,planetary gear sets
     
  4. BG1988

    BG1988 Full Access Member

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    Yeah the cables were pretty dirty under the positive cable

    the voltage is quite a bit more stable at 14.835 to 14.865 volts

    instead of jumping around from 14.2 to 14.8 aka "heavy ripple"

    the idle still has the normal rhythm idle but doe snot bother me because AUTO STOP is working correctly now SO i don't have to feel it anymore.

    but I don't have any reason to believe it has an issue with misfires as the catalytic converter temperature Stays at a stable 350 Celsius or 662 Fahrenheit when idle.. other wise it would be much much higher

    20200314_115323.jpg
     

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