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Aug 24th, 2023
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Joined: Aug 2011
Posts: 7,553 Likes: 88
Talk Morgan Guru
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Talk Morgan Guru
Joined: Aug 2011
Posts: 7,553 Likes: 88 |
Phil.
Maybe worth sending a PM to Adrian (AJSki2fly).
Though no longer a Morgan owner, he used to own a similar age +8 and (from memory) had a similar issue.
My recollection is that it was diagnosed with the help of a lot of tinkering and a rolling road at a local specialist garage.
However the fix was relatively simple.
Adrian is quite an expert on on most things to do with engines, so may be able to help.
Bud
4/4 - Stanley
Bud
4/4 "Stanley"
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Joined: Jul 2007
Posts: 28,416 Likes: 178
Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
Joined: Jul 2007
Posts: 28,416 Likes: 178 |
Might be a bit of a delay in reply though Simon - last seen 23/09/20...
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'09 Gen2 MINI Cooper ragtop
'90 LR 90 SW
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Joined: Aug 2020
Posts: 42
Just Getting Started
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OP
Just Getting Started
Joined: Aug 2020
Posts: 42 |
I got this message..
AJSki2fly is over their Private Topic limit.
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Joined: Apr 2013
Posts: 33
Just Getting Started
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Just Getting Started
Joined: Apr 2013
Posts: 33 |
Hi Phil
I experienced two sets of similar issues with my '93 Plus 8 (Hotwire), and well recall the frustration you are suffering.
My first problem was from an Ignition Amplifier on the way out. This is a small box usually attached to the side of the distributor, and is easy to source and replace. It doesn't like the heat apparently, so some cars may have the remote Lucas version mounted nearby. Changing this component solved my cutting out at idle .
Second problem came some years later, with "kangaroo" near-cutting-out when running, that would then right itself for some miles. I changed everything I and others could think of, with no improvement. Solution was careful inspection of the tired low-tension leads around the distributor, followed by judicious trimming and soldering to make better connections.
Neither suggestion may work for you, but I wish you luck.
Andrew Green
Glorious Devon
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Joined: Aug 2020
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Just Getting Started
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Just Getting Started
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Thanks Andrew.
I appreciate your ideas and I will certainly check them out.
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Joined: Dec 2017
Posts: 2,041 Likes: 71
Talk Morgan Expert
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Talk Morgan Expert
Joined: Dec 2017
Posts: 2,041 Likes: 71 |
On my 94 +8 I had the issue of the engine stalling when the vehicle came to a stop, fault code 48 showed on the ECU LED readout which is mainly the Stepper Motor sticking or incorrect base idle speed adjustment and possible throttle butterfly adjustment. After replacing Stepper Motor the problem persisted, I also checked the butterfly adjustment and in the end established it was a poor earth on the road speed sensor. Rough running can be attributed to fuel or ignition issues, do you know what code is being shown? These links might be useful: http://www.britishv8.org/Articles/Rover-14CUX-EFI.htmhttp://www.v8wizard.com/Setting_Air_Mass_Flow_Meter_and_Throttle_Pot.phphttps://www.actproducts.co.uk/2011/lucas-14cux-fuel-injection-system-%e2%80%93-installation-and-diagnostic-notes/ As I noted above my problem with stalling when coming to a stop was the road speed sensor not having a good earth.
Bruce
1964 4/4 Series V Comp (Megan)
1994 +8 (Maurice)
2013 M3W (Olga)
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Joined: Aug 2020
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Just Getting Started
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Just Getting Started
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Many thanks for that. I have not been able to locate the road speed sensor yet. I don’t seem to have a mechanical speedo cable.
I need to do a bit of research.
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Joined: Sep 2016
Posts: 1,384 Likes: 56
Has a lot to Say!
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Has a lot to Say!
Joined: Sep 2016
Posts: 1,384 Likes: 56 |
can you get a camera (phone) to get a pic of the rear of the speedo? You'd know for certain if you had a cable or not then. Mine is a 94, 3.9 EFi and it certainly has a cable driven speedo.
2012 Plus 4 in Sport Green. Much comfier than the Plus 8!
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Joined: Dec 2017
Posts: 2,041 Likes: 71
Talk Morgan Expert
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Talk Morgan Expert
Joined: Dec 2017
Posts: 2,041 Likes: 71 |
Many thanks for that. I have not been able to locate the road speed sensor yet. I don’t seem to have a mechanical speedo cable.
I need to do a bit of research. If you do have a cable driven speedo (which is most likely) then the Road Speed Sensor is probably mounted on the inside of the bulk head cut out where the transmission leaves the engine bay, it's a really fiddly position and is hidden from view. Locate where the clutch slave cylinder is mounted on top of the transmission and feel just behind it on the bulkhead side and you might be able to find the small square box with the speedo cable going in and cable coming out to the speedometer. The way I got to fix mine was by removing the transmission cover in the cabin.
Bruce
1964 4/4 Series V Comp (Megan)
1994 +8 (Maurice)
2013 M3W (Olga)
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Joined: Aug 2020
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Just Getting Started
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Just Getting Started
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I’ve taken a photo of the back of the speedo but I don’t know how to put it on here.
There is no cable, just wires. About five.
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