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Wales
by Joske Vermeule, September 1
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Forums39
Topics49,911
Posts838,138
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Jun 14th, 2026
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Joined: Jun 2015
Posts: 2,095 Likes: 75
Talk Morgan Expert
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Talk Morgan Expert
Joined: Jun 2015
Posts: 2,095 Likes: 75 |
I guess the main disadvantage of fitting an isolator is that the ecu loses it’s memory each time? I recall some years ago when I disconnected my battery, on restarting, the engine sounded pretty rough for the first 10 seconds or so.
Doug
2011 Plus 4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
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Joined: Dec 2009
Posts: 37,486 Likes: 992
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
Joined: Dec 2009
Posts: 37,486 Likes: 992 |
My Plus 8 seems unchanged with the interruption of power to the ECU, I can kid myself that the start up tick over is marginally higher but it's only when the engine and ambient is cooler really.
Interesting to read of your findings though on a different and more modern engine.
2009 4/4 Sport Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Con Green +8 prev
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Joined: Jun 2015
Posts: 2,095 Likes: 75
Talk Morgan Expert
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Talk Morgan Expert
Joined: Jun 2015
Posts: 2,095 Likes: 75 |
My Plus 8 seems unchanged with the interruption of power to the ECU, I can kid myself that the start up tick over is marginally higher but it's only when the engine and ambient is cooler really.
Interesting to read of your findings though on a different and more modern engine. Mine was quite rattly, as if the timing wasn’t right. Since then, I have always connected a spare battery in parallel before disconnecting the main one.
Doug
2011 Plus 4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
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Joined: Dec 2009
Posts: 37,486 Likes: 992
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
Joined: Dec 2009
Posts: 37,486 Likes: 992 |
My Plus 8 seems unchanged with the interruption of power to the ECU, I can kid myself that the start up tick over is marginally higher but it's only when the engine and ambient is cooler really.
Interesting to read of your findings though on a different and more modern engine. Mine was quite rattly, as if the timing wasn’t right. Since then, I have always connected a spare battery in parallel before disconnecting the main one. Interesting, a friend of mine was advised to do just the same when he changed his MINI one but was given no reason why. Your experience would have put me off too.
2009 4/4 Sport Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Con Green +8 prev
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Joined: Sep 2009
Posts: 7,435 Likes: 122
Talk Morgan Guru
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Talk Morgan Guru
Joined: Sep 2009
Posts: 7,435 Likes: 122 |
With my previous Morgan Roadsters, the battery switch was important because the battery was completely drained after 12 days. Unfortunately, I had to drive about 100 km before the engine felt lively and willing again.
The 4/4 also has a battery switch but it would not be so necessary and I hardly use it because the battery started even after months. Here the effect of learning after interrupted power in the ECU is also present but not as noticeable as in the Roadster.
'14 4/4 graphite grey
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Joined: Dec 2008
Posts: 22,371 Likes: 354
Roadster Guru Member of the Inner Circle
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Roadster Guru Member of the Inner Circle
Joined: Dec 2008
Posts: 22,371 Likes: 354 |
My S1 Roadster experience is quite different. I don't use the conditioner continuously, just every few weeks. A battery change at 13 years didn't seem to affect performance at all, and it will hold charge, certainly in summer for at least 3 months.
Whereas my Plus 4 loses charge after a week or so, which means I use the conditioner more often.
My Golf which sits outside and may not run for 3 months in winter holds charge for months.
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Joined: Sep 2009
Posts: 7,435 Likes: 122
Talk Morgan Guru
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Talk Morgan Guru
Joined: Sep 2009
Posts: 7,435 Likes: 122 |
My S1 did not have a battery switch, but with S2 and S3 I noticed the difference after power interruption.
'14 4/4 graphite grey
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Joined: Jul 2007
Posts: 28,911 Likes: 354
Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
Joined: Jul 2007
Posts: 28,911 Likes: 354 |
Interesting, a friend of mine was advised to do just the same when he changed his MINI one but was given no reason why. Possibly to not lose the radio code?
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW
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Joined: Dec 2009
Posts: 37,486 Likes: 992
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
Joined: Dec 2009
Posts: 37,486 Likes: 992 |
Interesting, a friend of mine was advised to do just the same when he changed his MINI one but was given no reason why. Possibly to not lose the radio code? That makes sense Graham.
2009 4/4 Sport Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Con Green +8 prev
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Joined: Jul 2007
Posts: 27,846 Likes: 764
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 27,846 Likes: 764 |
The 4/4 and +4 had isolation switches my Roadsters havent
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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