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by Joske Vermeule, September 1
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Jun 14th, 2026
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Joined: Jul 2010
Posts: 7
New to Talk Morgan
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OP
New to Talk Morgan
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Can anyone help please?
The car starts OK, but intermittently will suddenly lose half its power. It is as if you have lost 4 cylinders. You also get a strong smell of unburnt fuel. Stop the engine, wait a minute or two, start it again and all is OK. Sometimes this can be within a few miles, sometimes it can be after 100 miles. Have tried swapping most components but so far without luck. Now running out of ideas.
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Joined: Dec 2008
Posts: 22,366 Likes: 354
Roadster Guru Member of the Inner Circle
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Roadster Guru Member of the Inner Circle
Joined: Dec 2008
Posts: 22,366 Likes: 354 |
Sounds very electrical. Have you tried a new ignition module? V8 rotor arms are apparently of dubious quality, so I'd try another as a cheap test.
Not much help I know.......
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Joined: May 2009
Posts: 1,558 Likes: 5
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: May 2009
Posts: 1,558 Likes: 5 |
distributors, if same as used by land rover are known weak link, pick brains at Rimmer Bros if desperate
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Joined: Jul 2010
Posts: 7
New to Talk Morgan
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OP
New to Talk Morgan
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The ignition module actually failed during one of the test drives while trying to sort this problem so it got replaced anyway. Fault still exists. Rotor arm replaced as well (and coil, plug leads and currently trying a borrowed distributor) fault still there.
Thanks anyway.
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Joined: Jul 2010
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New to Talk Morgan
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Trying a borrowed distributor at the moment but the fault is still happening.
Thanks all the same.
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Joined: Jul 2007
Posts: 3,838 Likes: 9
le Asbo du Bling Talk Morgan Addict
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le Asbo du Bling Talk Morgan Addict
Joined: Jul 2007
Posts: 3,838 Likes: 9 |
Have you thought about giving something like Hometune or Cryptontune a go. Hopefully you'll find someone who knows how a proper car works.
Slowly going green
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Joined: Dec 2008
Posts: 22,366 Likes: 354
Roadster Guru Member of the Inner Circle
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Roadster Guru Member of the Inner Circle
Joined: Dec 2008
Posts: 22,366 Likes: 354 |
A LandRover Dealer or specialist is probably the best bet, but at a price. If it's not electrical it could be over-fuelling which wets the plugs, & causes a multiple misfire. If there's a temperature sensor which detects a cold start - try replacing that? An intermittent fault on a sensor might reset on restarting. If you can find out where it is - disconnect it while the engine is running badly and see what happens.
There was an incident last year with a Plus8 on carbs, and an aftermarket high pressure fuel pump caused a major problem which meant that it just wouldn't run. So excess fuel pressure can cause this. A blockage in the fuel return to the tank might also cause it.
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Joined: Jul 2010
Posts: 7
New to Talk Morgan
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OP
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I think maybe you are right about giving LandRover loads of money to look at this, it has been going on for some time now. Have already replaced the temperature sensor. Interesting thought about over-fuelling. Thanks for that and the possible blocked fuel return.
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Joined: Jul 2010
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Many thanks and worth a try. Do you think these might work with an intermittent fault?
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