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Aug 24th, 2023
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Joined: Sep 2010
Posts: 2,396 Likes: 14
Talk Morgan Expert
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Talk Morgan Expert
Joined: Sep 2010
Posts: 2,396 Likes: 14 |
My money would be on dodgy relays too, been there, done that.
1969 4/4
1995 plus 8
2002 Aero S1
2013 M3W
2014 Plus 8
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Joined: Jun 2015
Posts: 1,952 Likes: 41
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Jun 2015
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As relays have already been checked , I am with Budster and Max 5 on this: ignition key transponder or inertia switch..
Doug
2011 Plus 4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
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Joined: Jul 2014
Posts: 38 Likes: 1
Just Getting Started
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OP
Just Getting Started
Joined: Jul 2014
Posts: 38 Likes: 1 |
Thanks for your comments. I have checked the voltage at the pump and only seem to be getting 4.7 volts. I would have expected this to be 12.
I have checked all 3 keys and the transponder is in place.
The relays I have checked are a row of 4 in the aluminum fuse box under the bonnet.
I have pushed in the red button on the inertia switch and it seems to engaged.
I guess my next check is to run a direct feed to the pump and see if it runs. Should I do this by running a wire from the battery to the pump or is there an easier way?
Again, thanks for the help, please keep it coming as I am at a bit of a loss here!
Brendan
2018 Plus 4
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Joined: Feb 2007
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Talk Morgan Regular
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Talk Morgan Regular
Joined: Feb 2007
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Mine once had exactly the same symptoms, I did all the things talked about here and then tried the spare key, away it went, no problems since
Simon
2002 4/4
1936 Austin 12 light 4 Ascot saloon
2023 AMG Mercedes C300e estate
2021 Audi A1 sport
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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 |
Try one of the other keys.
There is always the possibility that the immobiliser pick up next to the ignition switch has slipped (although doubtful if the car has been stationary).
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'09 Gen2 MINI Cooper ragtop
'90 LR 90 SW
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Joined: Jul 2007
Posts: 26,748 Likes: 419
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 26,748 Likes: 419 |
Could the relay be faulty. I know you checked but try swapping it for one of the others. In the Roadster at least they are interchangeable. The low voltage seems to suggest it works but not totally.
JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger
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Joined: Nov 2015
Posts: 7,894 Likes: 241
Just barreling along Talk Morgan Guru
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Just barreling along Talk Morgan Guru
Joined: Nov 2015
Posts: 7,894 Likes: 241 |
Could the relay be faulty. I know you checked but try swapping it for one of the others. In the Roadster at least they are interchangeable. The low voltage seems to suggest it works but not totally. Mucky contacts on the reed faces within the relay, lack of regular switching & damp air in winter doesn't help
Jon M
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Joined: Jul 2007
Posts: 26,748 Likes: 419
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 26,748 Likes: 419 |
Exactly it is what happened to my S1 Roadster. What I didn't realise is that the fuel pump relay powers the ECU. That failed so whilst the dash lit up nothing happened.
JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger
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Joined: Dec 2013
Posts: 1,075 Likes: 1
Has a lot to Say!
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Has a lot to Say!
Joined: Dec 2013
Posts: 1,075 Likes: 1 |
For the uninitiated can you tell me where the fuel pump/ECU relay is located?
Many thanks.
John
John
Silver 2005 S1 Roadster V6 - Henrietta
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Joined: Jul 2007
Posts: 26,748 Likes: 419
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 26,748 Likes: 419 |
On your car under the dash Relays
JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger
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