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SORN
by OldSkrote - 31/07/25 02:07 PM
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Aug 24th, 2023
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Joined: Nov 2024
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I had an issue where the engine would occasionally cut out as it warmed up, it would start again but not running on all cylinders. Give it a few minutes and all would be OK. Took it to MMC and they looked at the fuel and earthing. Now solved, with the most likely cause one of the earthing points on the basis that (a) nothing was found wrong on the fuel and, (b) earthing faults were a known issue on the Plus Six.
Why that would only be when it was warming up is a mystery to me, but it could be related to your problem I guess. When you start the car a high amperage and quite a lot of stored charge is used, then during the first few minutes the alternator kicks out max charge to try and replenish the battery - this could show up in the faulty earth, and I suspect complex Mogs like a CX may well have a dedicated alternator earth connection Cheers Jon.
MY2023 Plus Six "Rachel"
MY2022 Volvo C40
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Pluged in my OBD2 trader, thanks for the info chaps. No error codes, even thought the engine management light was lit.
Got me thinking on some BMW cars if you change the battery you have to program it in, does anyone know if this applies to a Plus Six?
My new battery is a 096 /100 type that replaced a 096.
Previous Mog Plus 4 Fiat Twin Cam.
Plus Six
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On my plus four disconnecting has not needed reprogramming. I then changed the battery without reprogramming
JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger
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Mark at MMC got me to disconnect the battery on my Plus Six to reset the Bluetooth connection. Worked fine as a solution, and created no issues. So, no, you don't have to 'program it in'.
MY2023 Plus Six "Rachel"
MY2022 Volvo C40
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Could someone with a newish Plus Six please take a look and tell me what type of battery was installed by the factory?
Specifically is it a Type 096 AGM.
Previous Mog Plus 4 Fiat Twin Cam.
Plus Six
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MY23, it's a Banner Running Bull 70Ah AGM Leisure Battery.
MY2023 Plus Six "Rachel"
MY2022 Volvo C40
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MY23, it's a Banner Running Bull 70Ah AGM Leisure Battery. Thank you for the information.
Previous Mog Plus 4 Fiat Twin Cam.
Plus Six
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Talk Morgan Enthusiast
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MY23, it's a Banner Running Bull 70Ah AGM Leisure Battery. Are you sure? “Leisure” batteries are normally for caravans and motorhomes and not designed to produce the starting current for an engine.
Doug
2011 Plus 4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
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Yep, just double-checked. This is the battery: Plus Six Banner Battery and here is the datasheet: Banner 57001 datasheet
Last edited by High Hamster; 27/05/25 07:25 PM.
MY2023 Plus Six "Rachel"
MY2022 Volvo C40
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The spec of battery (Running Bull) is fine and correct but I still think the supplier has mis-named it. Banner Leisure batteries are meant fir caravans etc and are branded as “Energy Bull” not Running Bull.
Doug
2011 Plus 4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
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