Click here to return to the home page.
Morgan 3 Wheeler
Who's Online Now
0 registered members (), 185 guests, and 17 spiders.
Key: Admin, Global Mod, Mod
Top Posters(30 Days)
+8Rich 215
John V6 149
CooperMan 109
OZ 4/4 107
TBM 90
Newest Members
DalesPlusFour, Mark Adams, Ian12345Aero8, kiwi100, Steve_1970
8015 Registered Users
Newest Topics
Inauguration of the Morgan Brussel Belgium garage
by nestor59310. 26/06/22 10:07 PM
Sat nav glare
by M3W55. 26/06/22 08:37 PM
Are pressure washers worth it?
by Quicksilver. 26/06/22 06:58 PM
Plus4 Tonneau 1993
by Clive Fishing. 26/06/22 04:16 PM
I Had To Do It....
by Peter J. 26/06/22 12:38 PM
Vredestein t-trac 2 165/80r15
by Montegue. 26/06/22 08:06 AM
Wire Wheels - Chrome to Black Options?
by Montegue. 26/06/22 07:41 AM
Latest Photos
Isle of Man Trip June 2022
People of the Isle of Man Trip June 2022
Orkney
New Plus Four config...
MOG414 on MaltaTV part 1 &  2
Forum Statistics
Forums34
Topics43,535
Posts732,587
Members8,015
Most Online1,033
Dec 28th, 2019
Today's Birthdays
DaytonaMog
Previous Thread
Next Thread
Print Thread
Page 1 of 2 1 2
Fuel pump fuse #736942
23/03/22 04:00 PM
23/03/22 04:00 PM
Joined: Mar 2021
Posts: 3
Raleigh, NC USA
L
Louis Offline OP
New to Talk Morgan
Louis  Offline OP
New to Talk Morgan
L

Joined: Mar 2021
Posts: 3
Raleigh, NC USA
Issue with fuel pump, and have replaced with a new Walbro, but now need to run down electrical issues related to the pump. The fuel pump fuse did not blow (was correct amp) and instead melted the fuse block (see picture). anyone know how to remove the wiring from the fuse block? would like to either remove the fuse sockets and clean up the block, or install a separate fuse for the pump. all of this after tracing the electrics looking for any issues, but also looking for suggestions as to where to look. thanks

[img]https://docs.google.com/document/d/1OxdjXI5lDZDcJ8SgMSAKWzu24CRS3WiCbzmePoD10Ng/edit?usp=sharing[/img]

Re: Fuel pump fuse [Re: Louis] #736950
23/03/22 05:28 PM
23/03/22 05:28 PM
Joined: Mar 2020
Posts: 115
Bath
C
ChrisP Offline
L - Learner Plates On
ChrisP  Offline
L - Learner Plates On
C

Joined: Mar 2020
Posts: 115
Bath
Ouch - how very Morgan. I would be very cautious with the wiring if I were you and perhaps get an auto electrician to look at it unless you really know what you are doing. Auto electricians can appear expensive but far better than a fire.
Chris

Re: Fuel pump fuse [Re: Louis] #736958
23/03/22 06:22 PM
23/03/22 06:22 PM
Joined: Jun 2012
Posts: 1,870
United Kingdom, Lincolnshire
planenut Offline
Talk Morgan Enthusiast
planenut  Offline
Talk Morgan Enthusiast

Joined: Jun 2012
Posts: 1,870
United Kingdom, Lincolnshire

Welcome to Talk Morgan Louis. I would suggest that the problem was not the fuel pump but a poor connection to the fusebox, high resistance at the connector leads to localised heating. I think there is a spare fuse space if the holder is damaged beyond recovery at that location.

Re: Fuel pump fuse [Re: planenut] #736960
23/03/22 06:54 PM
23/03/22 06:54 PM
Joined: Mar 2021
Posts: 3
Raleigh, NC USA
L
Louis Offline OP
New to Talk Morgan
Louis  Offline OP
New to Talk Morgan
L

Joined: Mar 2021
Posts: 3
Raleigh, NC USA
thanks for the welcome...glad to be part of this group.

agree on the high resistance, as i've been tracing and checking the circuit back to the pump and have not yet found any issues. the spare fuse space is already taken (the fan kit used that slot), but i can add an auxiliary fuse block and move the fuse there (second fuse block is planned to support fog lights, heated vest for winter driving, etc.). issue is i cannot disassemble the fuse block. one of the locking slides comes out easily, but the other is stuck...likely melted to the block from the heat...and the wiring to the block is too short to turn it over to see what's going on. any suggestions on how to remove the fuse block greatly appreciated.

Re: Fuel pump fuse [Re: Louis] #736961
23/03/22 07:01 PM
23/03/22 07:01 PM
Joined: Nov 2015
Posts: 4,863
Northern Capital of Cool
CooperMan Offline
Just barreling along
CooperMan  Offline
Just barreling along
Part of the Furniture

Joined: Nov 2015
Posts: 4,863
Northern Capital of Cool
Looking at the distortion I wouldn't bother trying to re-use that fuse socket, as it will also have heat damage to the connector / cable below & oxides leading to bad continuity

I would carefully snip out the two wires from below and add in an inline fuse holder on fly leads with soldered connections into the existing wires, plenty of options online that take the same blade fuse as OE, you may even find a holder that clips onto the end of the existing grey base in your photo


Jon M
Re: Fuel pump fuse [Re: Louis] #737005
24/03/22 08:40 AM
24/03/22 08:40 AM
Joined: Nov 2013
Posts: 619
exagone
G
GLLOQ Offline
Talk Morgan Regular
GLLOQ  Offline
Talk Morgan Regular
G

Joined: Nov 2013
Posts: 619
exagone
[Linked Image]
[Linked Image]

I changed the walbro 250 liter hour pump to a walbro 160 liter hour pump, it consumes fewer amps and less noisy, it may be GS 278 the reference.

Re: Fuel pump fuse [Re: GLLOQ] #737107
25/03/22 01:36 PM
25/03/22 01:36 PM
Joined: Mar 2021
Posts: 3
Raleigh, NC USA
L
Louis Offline OP
New to Talk Morgan
Louis  Offline OP
New to Talk Morgan
L

Joined: Mar 2021
Posts: 3
Raleigh, NC USA
Thanks for the info, and wonder if this isn't a common problem (well, at least more than just the two of us). happened to me with the stock pump, although if the issue is a faulty connection in the fuse block this would melt the connection but not blow the fuse. just odd that we have the exact same symptoms, but in any event, have now solved with a solution just like yours.

Re: Fuel pump fuse [Re: Louis] #737163
25/03/22 08:56 PM
25/03/22 08:56 PM
Joined: Jun 2012
Posts: 1,870
United Kingdom, Lincolnshire
planenut Offline
Talk Morgan Enthusiast
planenut  Offline
Talk Morgan Enthusiast

Joined: Jun 2012
Posts: 1,870
United Kingdom, Lincolnshire

It is not a common problem, most failures are of the original specification fuel pump, not the power supply. There have been very few (none?) fuel pump failures reported after changing to the Walbro GS342 fuel pump. The Range Rover V8 EFi owners researched the issue with the standard pump pretty well, although I will agree it is vastly over specified for the S&S X-Wedge requirements.

I think your problem is with the fuse box installation and it's poor connectors. Maybe a good idea to break and make the fuse box connectors to ensure good connections? I suppose we have a mentality that M3W's are still "new" cars and shouldn't suffer from problems like corroded electrics, thats for "old" cars, but some are now over 10 years old and have sat in cold damp garages. Not saying that applies to your car Louis but it may to others in the future, you may just have a loose connector.

Re: Fuel pump fuse [Re: Louis] #737188
26/03/22 08:27 AM
26/03/22 08:27 AM
Joined: Feb 2016
Posts: 4,902
East Harling, Norfolk UK
RichardV6 Offline
Part of the Furniture
RichardV6  Offline
Part of the Furniture

Joined: Feb 2016
Posts: 4,902
East Harling, Norfolk UK
Originally Posted by Louis
Thanks for the info, and wonder if this isn't a common problem (well, at least more than just the two of us). happened to me with the stock pump, although if the issue is a faulty connection in the fuse block this would melt the connection but not blow the fuse. just odd that we have the exact same symptoms, but in any event, have now solved with a solution just like yours.

This is not at all unusual Louis in any electrical circuit high or low voltage, AC or DC. The heat damage occurs due to build up over a significant amount of time often due to the tiniest additional contact resistance allied to constant significant current draw. The power (i2r) loss that creates heat at this point being proportional to the square of the current! In your situation this won't cause an increase in overall current draw from pump, it might even be a tad less so fuse won't be effected.

As an example I had a suitably fused high current DC connection on a boat secured solidly through 15mm plywood by M12 nuts and bolt. This hefty fixing got so hot it charred the wood that supported it!


Richard

2018 Roadster - Red/Magnolia - "Morton"
1966 Land Rover series 2a SWB
1945 Moto Guzzi Airone
Re: Fuel pump fuse [Re: Louis] #737194
26/03/22 10:33 AM
26/03/22 10:33 AM
Joined: Feb 2019
Posts: 1,669
New River Valley, VA
rcmatt Offline
Talk Morgan Enthusiast
rcmatt  Offline
Talk Morgan Enthusiast

Joined: Feb 2019
Posts: 1,669
New River Valley, VA
I suspect you either has some moisture/dirt grim or the fuse wasn't in snug, leading to poor contact. That will lead to heat which will make the contact worse over time until you have a failure. I would take out all your fuses and clean with contact cleaner and reinsert them just for good measure.


Rodger
2018 M3W "Dreamers on the Rise"
2004 Plus 8 (wife's)
old Goldwings and a couple of Harleys
Page 1 of 2 1 2

Moderated by  TalkMorgan 

Powered by UBB.threads™ PHP Forum Software 7.7.1