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Re: Fuel pump problem
[Re: jaypee]
#685526
28/01/21 09:38 AM
28/01/21 09:38 AM
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Joined: Apr 2017
Posts: 1,375 Staffordshire
IvorMog
Has a lot to Say!
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Has a lot to Say!
Joined: Apr 2017
Posts: 1,375
Staffordshire
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I had a similar problem on my 1999 Zetec and went through the same thought process as you are now.
I could only see 2 ways.
One is to cut the frame above the tank and then make some brackets to bolt to back together again. However this destroys the integrity of the frame and as I also wanted to remove the fuel level sensor and check the inside of the tank, I chose the other route.
Which is to drop the tank out of the bottom by cutting the floor and then replacing it with brackets to bolt the tank up from underneath so that it becomes easily removable in future.
It's a sod of a job to do especially on your own but it is doable. I cursed an awful lot during the process.
I did consider buying a new tank and custom made bracket for the replacement but as the tank was in excellent condition, I replaced it and made my own bracket to put it back together.
If you go down the same route, I may be able to give you some tips.
Edit........ If you go down my route, I hope your tank is fairly empty because if your pump is completely dead it will be very difficult to drain the tank and dropping a full tank will be very difficult.
Are you absolutely certain the pump is dead. Have you run separate power and earth cables to test it?
Last edited by IvorMog; 28/01/21 09:44 AM.
Bob
1999 4/4 2 litre Zetec
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Re: Fuel pump problem
[Re: jaypee]
#685529
28/01/21 09:51 AM
28/01/21 09:51 AM
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Joined: Sep 2014
Posts: 1,820 London
MOG 615
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Sep 2014
Posts: 1,820
London
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First I would check that the pump is truly dead, these pumps are really very reliable and outlast the life of the car in most cases.
I don't know the ECU control system on the 4/4 as well as the +8 of the same era, but the fuel pump feed is controlled by the ECU, once up to fuel line pressure the ECU shuts off the supply. This might be an issue.
Secondly the most common problem for the fuel pump is a poor relay, which does not allow current to the pump , however with a separate feed I think we could rule this one out.
If you really do need to replace the pump I understand there are 2 methods but I only have experience of the first:-
1 Drop the whole fuel tank under the car. This is done by releasing the chassis bolts to the wooden mounting boards and then twisting each board carefully so that they can be removed, and the tank released downwards . Not an easy job for the home mechanic as you need quite a lot of clearance under the car , and the bolts holding the boards to the chassis , and the tank to the boards can be very messy to undo , and access is not easy at the best of times. You will also need to support the tank carefully as it is released.
2 I have been informed that it is possible to release the spare wheel mounting woodwork and gain access that way . As I have said I don't have any experience of this , and I can only envisage that access is going to be a major issue , and also whether the woodwork has been glued or bolted into place . I hope others who have tackled this will be along to comment soon.
Good luck
Andy G 1999 +8 , Indigo Blue. Ex-John McKecknie/Mike Duncan 1955 +4 racer.
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Re: Fuel pump problem
[Re: jaypee]
#685531
28/01/21 09:52 AM
28/01/21 09:52 AM
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Joined: Jul 2007
Posts: 19,165 Suffolk
John V6
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 19,165
Suffolk
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The relay is a good place to go first.
JohnV6 2006 Indigo Blue Roadster S1 2014 Brooklands Edition Roadster "Brookland's Belle" #5 of 50
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Re: Fuel pump problem
[Re: jaypee]
#685542
28/01/21 10:45 AM
28/01/21 10:45 AM
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Joined: Dec 2011
Posts: 312 South West France
CBY
Learner Plates Off!
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Learner Plates Off!
Joined: Dec 2011
Posts: 312
South West France
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To take out the fuel tank the major problem is the wooden floor board obstructed by the axle. Using 2 ratchet locking straps between the axle and the rear telescopic MTG bar you can compress the suspension and have enough gap to take out the wooden floor and drop the tank.
Regards 2005 PLUS 4
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Re: Fuel pump problem
[Re: jaypee]
#685591
28/01/21 01:12 PM
28/01/21 01:12 PM
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Joined: Apr 2017
Posts: 1,375 Staffordshire
IvorMog
Has a lot to Say!
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Has a lot to Say!
Joined: Apr 2017
Posts: 1,375
Staffordshire
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Out of interest, how would a dealer do it?
Bob
1999 4/4 2 litre Zetec
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Re: Fuel pump problem
[Re: jaypee]
#685595
28/01/21 01:19 PM
28/01/21 01:19 PM
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Joined: Nov 2015
Posts: 3,345 Yorkshire
CooperMan
Just barreling along
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Just barreling along
Talk Morgan Addict
Joined: Nov 2015
Posts: 3,345
Yorkshire
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Could you leave the existing dead pump in situ (if it still allows fuel to be sucked through it) and install an in-line version spliced into the feed line? There are some really compact solid state pumps that racers use
Jon M
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