7 members (Deejay, Adam12, Morganmike, aerotaff, Ian Wegg, brownbaker, JohnHarris),
265
guests, and
39
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
Forums34
Topics48,337
Posts812,923
Members9,203
|
Most Online1,046 Aug 24th, 2023
|
|
|
Joined: Sep 2019
Posts: 139 Likes: 1
L - Learner Plates On
|
OP
L - Learner Plates On
Joined: Sep 2019
Posts: 139 Likes: 1 |
So, my 2018 M3W had its MoT today. 30 mile journey home no problems but as I pull in to the drive the revs start to drop and engine cuts out. It won't restart. It turns over fine but not firing up at all. Plenty of fuel in the tank. No previous engine issues. 3,900 miles Only. So what is the sequence of checks? Is it the dreaded fuel pump? Any help much appreciated! 
|
|
|
|
Joined: Jul 2013
Posts: 3,658 Likes: 48
Talk Morgan Addict
|
Talk Morgan Addict
Joined: Jul 2013
Posts: 3,658 Likes: 48 |
Can you hear the fuel pump running when you switch the ignition on? If not check the cutout switch - a black rubber button to the right hand side of the back of the oil tank.
Red Leader
|
1 member likes this:
Landy |
|
|
|
Joined: Sep 2019
Posts: 139 Likes: 1
L - Learner Plates On
|
OP
L - Learner Plates On
Joined: Sep 2019
Posts: 139 Likes: 1 |
I checked the switch, no obvious click or depression when pushed. I'm really not sure if I can hear the fuel pump behind me. I can here something at the front.
|
|
|
|
Joined: Feb 2019
Posts: 3,854 Likes: 2
Talk Morgan Addict
|
Talk Morgan Addict
Joined: Feb 2019
Posts: 3,854 Likes: 2 |
Get a new Walbro fuel pump.
The light at the end of the tunnel is actually a train. 2019 M3W
|
1 member likes this:
Landy |
|
|
|
Joined: Sep 2019
Posts: 139 Likes: 1
L - Learner Plates On
|
OP
L - Learner Plates On
Joined: Sep 2019
Posts: 139 Likes: 1 |
So, just looking at it now everything has cooled. Fuel pump fuse OK! Opened the boot and nothing obviously loose. Turn ignition key and I can hear the pump energising. Engine now starts. Switch off and on again, engine starts but idles for a few seconds then stops. Ignition on again and no pump energising.
So is it definitely the pump or is there anything else to rule out before I start ordering the bits?
|
|
|
|
Joined: Feb 2019
Posts: 1,876 Likes: 15
Talk Morgan Enthusiast
|
Talk Morgan Enthusiast
Joined: Feb 2019
Posts: 1,876 Likes: 15 |
Rodger 2018 M3W "Dreamers on the Rise" 2004 Plus 8 (wife's) old Goldwings and a couple of Harleys
|
1 member likes this:
Landy |
|
|
|
Joined: May 2011
Posts: 1,613 Likes: 22
Talk Morgan Enthusiast
|
Talk Morgan Enthusiast
Joined: May 2011
Posts: 1,613 Likes: 22 |
All the symptoms of a bad fuel pump, if you have a fuel pressure gauge there is a schrader test port on top of the engine, it should be a steady 58psi.
2021 M3W 2013 M3W - Sold 1971 4/4 2 Seater 1934 Sports
|
1 member likes this:
Landy |
|
|
|
Joined: Oct 2012
Posts: 2,776 Likes: 59
Talk Morgan Expert
|
Talk Morgan Expert
Joined: Oct 2012
Posts: 2,776 Likes: 59 |
All the symptoms of a bad fuel pump, if you have a fuel pressure gauge there is a schrader test port on top of the engine, it should be a steady 58psi. +1 and I'll add that the 58psi needs to be with the engine running. With the ignition on but engine off, the pump runs for a few seconds and may appear to come up to pressure but with the engine running and a dodgy pump it can't maintain the pressure hence the cutting out. Have been there, and have just bought another pump as a spare.
|
1 member likes this:
Landy |
|
|
|
Joined: Jul 2013
Posts: 3,658 Likes: 48
Talk Morgan Addict
|
Talk Morgan Addict
Joined: Jul 2013
Posts: 3,658 Likes: 48 |
So, just looking at it now everything has cooled. Fuel pump fuse OK! Opened the boot and nothing obviously loose. Turn ignition key and I can hear the pump energising. Engine now starts. Switch off and on again, engine starts but idles for a few seconds then stops. Ignition on again and no pump energising.
So is it definitely the pump or is there anything else to rule out before I start ordering the bits? 99% the pump but the pressure check Rog suggested would confirm it. I would change the pump for the Walbro anyway
Red Leader
|
|
|
|
Joined: Dec 2008
Posts: 21,865 Likes: 167
Roadster Guru Member of the Inner Circle
|
Roadster Guru Member of the Inner Circle
Joined: Dec 2008
Posts: 21,865 Likes: 167 |
Have you replaced the fuse? A fuse can look OK and test OK, but can develop a hairline crack which will open up under load.
DaveW '05 Red Roadster S1 '16 Yellow (Not the only) Narrow AR GDI Plus 4
|
|
|
|
|