Battery issue, Charging issue or BMS issue?

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Raptorbert

Raptorbert

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You guys tried to unplug the BMS sensor and see how the truck charges? It may revert to charging like you would expect a vechile to.
I’m not even sure what I’m looking for. I just seem to notice that start stop wasn’t working as expected with the motorcraft battery but has been with my Walmart H8. I’m sure there’s tons of algorithms in between the computer saying engage and the battery itself though.
 

dh2002

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I had the same issue and after chasing it for a bit I installed a NOCO battery maintainer and just plug it in during the time I'm using my commuter car for work.
 
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Raptorbert

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I had the same issue and after chasing it for a bit I installed a NOCO battery maintainer and just plug it in during the time I'm using my commuter car for work.
That should only be expected with a car that gets infrequently used. Mine goes everywhere, every day
 

dh2002

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That should only be expected with a car that gets infrequently used. Mine goes everywhere, every day
I agree, what ford told me in the end is because of the amount of electronics in the vehicle the alternator isnt enough to recharge the SOC on short drives. The truck needs 2 plus hours driven everyday to recharge. I called BS but at that point I got annoyed enough to not deal with them anymore.
 
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Raptorbert

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I agree, what ford told me in the end is because of the amount of electronics in the vehicle the alternator isnt enough to recharge the SOC on short drives. The truck needs 2 plus hours driven everyday to recharge. I called BS but at that point I got annoyed enough to not deal with them anymore.
That’s total BS. I’ve yet to drive over an hour and a half with my H8 and stop start engages nearly immediately.
 

dh2002

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That’s total BS. I’ve yet to drive over an hour and a half with my H8 and stop start engages nearly immediately.
Yeah I just walked away from the tech at that point. Problem is with modern electronics you could be chasing a ghost and it’ll fix itself for some reason.
 

swoop1156

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You guys tried to unplug the BMS sensor and see how the truck charges? It may revert to charging like you would expect a vechile to.
Unplug for what reason? Just do a BMS reset to the system. I wouldn't be unplugging any sensor that is related to the issue I'm having...?
I had the same issue and after chasing it for a bit I installed a NOCO battery maintainer and just plug it in during the time I'm using my commuter car for work.
I have 2,067 miles on my Mach 1 in over two years and it needs zero battery maintaining. I use one, but when all this started I left it off for the entire winter and only got the deep sleep mode after 14 days, which is be design. Never had any issues with the battery itself. My truck would drive 2-3 hours and be dead when it arrived. I did ten hours and it lasted overnight before getting stupid. It's that Motorcraft battery from factory.
I agree, what ford told me in the end is because of the amount of electronics in the vehicle the alternator isnt enough to recharge the SOC on short drives. The truck needs 2 plus hours driven everyday to recharge. I called BS but at that point I got annoyed enough to not deal with them anymore.
Yeah, definitely not how it should be. No issues since the H8.
 

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One interesting data point… BCM got reprogrammed with presumably the most current version to fix a weird issue with the door locks. Haven’t noticed any low battery related behavior since then.
 
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Raptorbert

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Mines still going great. It even sat for 49hrs straight while I was at work and ASS engaged pretty quickly on the way home
 
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