Click here to return to the home page.
Image of a road.
Who's Online Now
11 members (DMC1904, TomS, The Flitting, asterix, BLUE+4, mph, John07, Graham, G4FUJ, Grumpy2, DJC, Vansrv6), 321 guests, and 44 robots.
Key: Admin, Global Mod, Mod
Top Posters(30 Days)
+8Rich 64
Adam12 62
John V6 58
Newest Members
Chris Ontario, NickMog, YellowM, Dufty, Anted4
9,215 Registered Users
Newest Topics
For saleWood rim moto-lita
by hugo - 30/07/25 04:28 PM
For Sale 2015 M3W - £23,000
by MOG42 - 29/07/25 06:28 PM
AC Cobra Rep. Vs Plus 8
by Richardllll - 29/07/25 04:40 PM
Me Again
by Whizjet - 29/07/25 03:13 PM
Tyre dates on Yokohama tyres
by SteveMerch - 29/07/25 12:39 PM
Aero 8 Maintenance
by mph - 29/07/25 09:24 AM
Pur Sang Type 35
by BillHart - 28/07/25 06:49 PM
Latest Photos
Moto-lita for sale
Moto-lita for sale
by hugo, July 30
2015 M3W for sale
2015 M3W for sale
by MOG42, July 29
Motorworld München
Motorworld München
by Oskar, July 20
visit to Classic Remise Düsseldorf
my book
my book
by Oskar, July 20
Forum Statistics
Forums34
Topics48,364
Posts813,336
Members9,215
Most Online1,046
Aug 24th, 2023
Today's Birthdays
There are no members with birthdays on this day.
Previous Thread
Next Thread
Print Thread
Joined: Feb 2007
Posts: 94
Just Getting Started
OP Offline
Just Getting Started
Joined: Feb 2007
Posts: 94
Hi there.... long time....

Having just revived my 87 Plus 8, my garage is reporting that my Lucas 4 ECU fuel control unit 83986B is lacking an ignition signal.

I would very much appreciate a recommendation for a company to repair that please.

Also - having fitted a wider exhaust, though the car runs within MOT specs, I can taste fuel in my mouth. Perhaps an ECU tweak might help?

With many many thanks in advance,
Paul


1987 Morgan Plus 8
Joined: Sep 2014
Posts: 2,272
Likes: 7
Talk Morgan Expert
Offline
Talk Morgan Expert
Joined: Sep 2014
Posts: 2,272
Likes: 7
Paul

Is your fuel injection "Flapper" (13CUX) or "Hotwire" (14CUX)? I think I have a fault finding manual for the latter , but not for the former.


Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.
Joined: Dec 2009
Posts: 35,790
Likes: 471
Tricky Dicky
Member of the Inner Circle
Online Content
Tricky Dicky
Member of the Inner Circle
Joined: Dec 2009
Posts: 35,790
Likes: 471
Does Russell @ Revolutions have any contacts he can share with you ?

Maybe worth a trawl through this .

I notice there are some units for sale on fleabay but they have an "A" suffix and I have no idea how or if that is significant.


2009 4/4 Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Connaught Green +8 prev





Joined: Jun 2019
Posts: 1,211
Likes: 21
Has a lot to Say!
Offline
Has a lot to Say!
Joined: Jun 2019
Posts: 1,211
Likes: 21
Hi Paul
Give Derek a ring at Turriff Auto Electrical, he worked with Lucas until they shut up shop. He might be able to help you out. A Google search will bring them up.


Gordon Duguid
2014 Duratec engine plus 4, Montreal blue.
Joined: Feb 2007
Posts: 94
Just Getting Started
OP Offline
Just Getting Started
Joined: Feb 2007
Posts: 94
Thank you for your replies (and private message). very much appreciated...

MOG 615, its a flapper PRC4764 i'm afraid.


1987 Morgan Plus 8
Joined: Feb 2013
Posts: 449
Likes: 30
B
Learner Plates Off!
Offline
Learner Plates Off!
B
Joined: Feb 2013
Posts: 449
Likes: 30
Paul, does the engine start and run? The ecu as far as I can remember gets its signal from the distributor, the ignition side (ie spark) is separate from the ecu which is only for fuelling, try taking the ecu apart and re-soldering the transistor connections they usually show cracks in the solder (dry joint). If all else fails I have a complete set of parts for the flapper from my car that I kept when i changed the lucas system for something modern and more efficient (as well as full fuel and ignition mapping) PM me.

David Byrne

Joined: Feb 2013
Posts: 449
Likes: 30
B
Learner Plates Off!
Offline
Learner Plates Off!
B
Joined: Feb 2013
Posts: 449
Likes: 30
Paul, quick correction the ecu gets its signal from the coil. sorry for the mistake.

David Byrne


Moderated by  TalkMorgan 

Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5