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Sold
by simon8201 - 09/09/26 01:46 PM
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Wales
by Joske Vermeule, September 1
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Forums39
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Posts838,018
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Jun 14th, 2026
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Joined: Oct 2010
Posts: 46
Just Getting Started
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OP
Just Getting Started
Joined: Oct 2010
Posts: 46 |
Hi Malcolm, according to RPI the running characteristics are common to Hot wire engines as well, ideally i would like to contact an owner with the same engine whom can confirm the problems and then state that the upgrades work???
I could be looking at a trip to Norfolk when i get chance.
Duffs
Morgan-tastic!!!!
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Joined: Jul 2010
Posts: 78
Time Merchant Just Getting Started
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Time Merchant Just Getting Started
Joined: Jul 2010
Posts: 78 |
Duffs, for the record I have experienced none of the problems you mentioned. Mine is a 4.0 from 2004 and pulls very smoothly, as you would expect, in almost any gear at any speed.
2004 Plus 8
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Joined: Feb 2009
Posts: 25
Just Getting Started
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Just Getting Started
Joined: Feb 2009
Posts: 25 |
Hi I have a 1999 +8 3.9 with a John Eales mod. I had running problems when I first bought it and had a new stepper motor fitted which cost £130. It was running pretty rough up till then. HOWEVER I then found out on a TVR site that they can be cleaned. I have done mine myself since as it seemed to need it, probably through lack of use. Cleaning costs nothing so give it a go. 
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Joined: Jul 2007
Posts: 27,838 Likes: 764
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 27,838 Likes: 764 |
Duffs, I am not an expert on +8s but my +4 needed a new ECU this year due to intermittent faults. GoMog has a lot of data on your system. Good luck John http://www.gomog.com/allmorgan/GEMS/GEMSbyPoole.pdf
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Aug 2009
Posts: 152
L - Learner Plates On
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L - Learner Plates On
Joined: Aug 2009
Posts: 152 |
Hi All, This doesn't apply to the Duff's car. Only for 4.0L with GEMS system. BR Daniel.
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Joined: Oct 2010
Posts: 46
Just Getting Started
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OP
Just Getting Started
Joined: Oct 2010
Posts: 46 |
Hi Wrinklies, could you PM me some more info on this John Earles mod please???
Thanks Duffs
Morgan-tastic!!!!
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Joined: May 2009
Posts: 238 Likes: 3
L - Learner Plates On
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L - Learner Plates On
Joined: May 2009
Posts: 238 Likes: 3 |
Hi
I think the main issue with your car is brain, the land-rover standard ECU sets the fuel mixture every 1000rpm , by adding the chip it will be corrected every 100RPM this does away the steps in acceleration, The RPI chip is ok but I believe John McDonald retails one which is set up specifically for +8's ( light car ) wereas the RPI one is a general chip , If you are not looking at performance this is the only mod I would make .
Cheers
Alan
1999 Morgan Plus 8. 3.9 ....
1961 Alvis TD21 Series1 3 Litre Auto....
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Joined: Oct 2010
Posts: 46
Just Getting Started
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OP
Just Getting Started
Joined: Oct 2010
Posts: 46 |
I was speaking to a a very knowledgeable guy who races an Aero 8 and he has recommended taking my Plus 8 down to a company called Austec near Gatwick whom will rolling road and perform diagnostics as he believes my problems may not be ECU related.
I 'll keep you all updated,
Duffs
Morgan-tastic!!!!
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Joined: Aug 2010
Posts: 534 Likes: 1
Talk Morgan Regular
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Talk Morgan Regular
Joined: Aug 2010
Posts: 534 Likes: 1 |
Paul at Austec is a good guy but be prepared for £1000 to rolling road the car. You might want a chat with him first to see if he can offer some diagnosis without setting it up on the rollers.
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Joined: Oct 2010
Posts: 46
Just Getting Started
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OP
Just Getting Started
Joined: Oct 2010
Posts: 46 |
Is that £1,000 or £100?  I hope its the latter.
Morgan-tastic!!!!
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