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NickMc



Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1572

Northern Ireland 2006 Defender 90 Td5 HT Bonatti Grey
Does the pump run to bleed the system if you pump the pedal quickly (top to bottom) 5 times?

Driver demand is a fault with the accelerator pedal or wiring to it- the later most likely.

Does it crank?

You could take the pipe off at the regulator to see if you have fuel, bit rough and ready, but would give you some direction without a pressure gauge.
Post #1029089 23rd Mar 2024 6:55pm
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 583

Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
With correctly working fuel pump, it gives 3l per minute
So when you disconnect fuel line, is is more like shower, not like tiny little flow. Not fully working fuel pump is not able to purge the fuel system. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #1029104 23rd Mar 2024 8:51pm
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jasryan



Member Since: 27 Feb 2024
Location: Cork
Posts: 14

Ireland 
Yeah it went through the purge alright, but I think I’ll just bite the bullet and go for pump now, even though the mV through the fuse looked good
Post #1029112 23rd Mar 2024 9:41pm
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NickMc



Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1572

Northern Ireland 2006 Defender 90 Td5 HT Bonatti Grey
Could have a restriction in the tank, blocking the pump sucking is the other possibility?

Don’t waste your time with aftermarket pumps, you will be back doing it again- VDO only.
Post #1029291 25th Mar 2024 9:07pm
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AJC



Member Since: 30 Nov 2015
Location: Lancashire
Posts: 1336

United Kingdom 
i really wouldn't cut a hole in to check, do it properly and drop tank
Post #1029326 26th Mar 2024 7:54am
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andy2111



Member Since: 17 Oct 2021
Location: Kent
Posts: 365

United Kingdom 2002 Defender 110 Td5 HT Bonatti Grey
Did you locate your fuel pump relay and properly check it for signs of scorching etc? I know you said you had 3 relays, but not sure if you pulled the fuel pump and looked at the pins, socket and wires?

I had very similar power issues a couple of years ago and had the fuel pump replaced and it didn't make the slightest difference and was an expensive thing to try.

My relay was scorched so I bought a new one and fitted a new socket on some freshly bared wire and it hasn't caused me any problems since. It's a cheap and quick thing to try if you've not done it already. TD5 hardtop to Puma inspired Poptop - my build thread

2002 110 TD5 Hardtop ¦ Full Puma interior ¦ Carpathian grey / Santorini black ¦ X-Vision-X poptop
Post #1029396 26th Mar 2024 7:28pm
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Procta



Member Since: 04 Dec 2016
Location: Sunderland
Posts: 4951

United Kingdom 
AJC wrote:
i really wouldn't cut a hole in to check, do it properly and drop tank


yeah if you have a pal who is willing to give you a hand, Id drop it. It didn't really take me and my dad do mine, We had it dropped with in an hour and half if anything. We had a right laugh getting the replacement stuff to settle though, Once we cracked that and emptied the tank, We were on our way with in a matter of 2 hours all in. A bit of time and that's it, well tbh i think me and my dad have tackled for worse jobs on a rover metro Thumbs Up Defender TD5 90 ---/--- Peugeot 306 HDI hatch back

Success is 90% Inspiration and 4 minutes Preparation # you can make it!
Post #1029427 27th Mar 2024 2:23am
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Procta



Member Since: 04 Dec 2016
Location: Sunderland
Posts: 4951

United Kingdom 
andy2111 wrote:
Did you locate your fuel pump relay and properly check it for signs of scorching etc? I know you said you had 3 relays, but not sure if you pulled the fuel pump and looked at the pins, socket and wires?

I had very similar power issues a couple of years ago and had the fuel pump replaced and it didn't make the slightest difference and was an expensive thing to try.

My relay was scorched so I bought a new one and fitted a new socket on some freshly bared wire and it hasn't caused me any problems since. It's a cheap and quick thing to try if you've not done it already.


id just replace the relay and check the wiring for the sake of what it cost for a replacement relay, only like a tenner. Defender TD5 90 ---/--- Peugeot 306 HDI hatch back

Success is 90% Inspiration and 4 minutes Preparation # you can make it!
Post #1029428 27th Mar 2024 2:24am
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jasryan



Member Since: 27 Feb 2024
Location: Cork
Posts: 14

Ireland 
andy2111 wrote:
Did you locate your fuel pump relay and properly check it for signs of scorching etc? I know you said you had 3 relays, but not sure if you pulled the fuel pump and looked at the pins, socket and wires?


pulled all 3 and they looked fine...

Going to sort the pump - I sourced a non-VDO model to try with first, if it sorts problem, I'll go source a VDO pump.
Post #1029510 27th Mar 2024 5:22pm
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jasryan



Member Since: 27 Feb 2024
Location: Cork
Posts: 14

Ireland 
Well... success!!

Looks like it was the fuel pump... old one looks pretty nasty with gunk on the bottom. So will probably go source a VDO model now.

It's quiet smokey now though... even after taking it for a short spin and bringing it back to idle, it's a lot more smokey than it ever was... white smoke.



Click image to enlarge
Post #1029638 28th Mar 2024 5:53pm
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NickMc



Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1572

Northern Ireland 2006 Defender 90 Td5 HT Bonatti Grey
NickMc wrote:
Could have a restriction in the tank, blocking the pump sucking is the other possibility?

Don’t waste your time with aftermarket pumps, you will be back doing it again- VDO only.



Whistle

I would clean that off ( you can disassemble them) and the tank out and I bet it lives again. I really would buy the good pump, I won’t even fit the aftermarket and places won’t even sell them, lucky if you get 6 months out of it.
Post #1029691 28th Mar 2024 11:50pm
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Procta



Member Since: 04 Dec 2016
Location: Sunderland
Posts: 4951

United Kingdom 
jasryan wrote:
Well... success!!

Looks like it was the fuel pump... old one looks pretty nasty with gunk on the bottom. So will probably go source a VDO model now.

It's quiet smokey now though... even after taking it for a short spin and bringing it back to idle, it's a lot more smokey than it ever was... white smoke.



Click image to enlarge


i bet its not running on 5 cylinders either, with it smoking like that. Mine certainly wasn't. Id put money on this been the original unit that was in, Mine was very clean, it was a cheap unit installed, i did find a receipt for it, and it looked like the specialist hadn't spent the proper conkers, and nor did the owner really. Swopped it over with a VDO unit and we were back in business. Me and my dad were over the moon to hear it fire up. Defender TD5 90 ---/--- Peugeot 306 HDI hatch back

Success is 90% Inspiration and 4 minutes Preparation # you can make it!
Post #1029996 1st Apr 2024 2:24am
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Procta



Member Since: 04 Dec 2016
Location: Sunderland
Posts: 4951

United Kingdom 
NickMc wrote:
NickMc wrote:
Could have a restriction in the tank, blocking the pump sucking is the other possibility?

Don’t waste your time with aftermarket pumps, you will be back doing it again- VDO only.



Whistle

I would clean that off ( you can disassemble them) and the tank out and I bet it lives again. I really would buy the good pump, I won’t even fit the aftermarket and places won’t even sell them, lucky if you get 6 months out of it.


i wouldn't be surprised if you could rebuild one with better parts, back in the metro days, a couple of the lads used to upgrade the SPI pump, to a cosworth Fuel pump, and all they did was change the pump unit in the fuel pump, to a stronger PSI unit, to make the car MPI, so it would run the 1.8 16v and VVC units. Defender TD5 90 ---/--- Peugeot 306 HDI hatch back

Success is 90% Inspiration and 4 minutes Preparation # you can make it!
Post #1029997 1st Apr 2024 2:27am
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jasryan



Member Since: 27 Feb 2024
Location: Cork
Posts: 14

Ireland 
Just quick follow up to say thanks to all for the advice and tips - running well now the last week - it doesn't do much mileage really, but running smooth as a Defender can right now anyway Smile
Haven't sourced a proper VDO pump yet, but I will, and keep this one I put in as a spare.

Now on with the other list of jobs for it... brake discs, pads, etc etc - the never ending list! Should be ready for a 2 week trip in France later on this year Very Happy
Post #1030591 5th Apr 2024 9:40am
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jasryan



Member Since: 27 Feb 2024
Location: Cork
Posts: 14

Ireland 
Quick update - I still have an issue, which I suspect is going to be a little harder to diagnose... been out on two separate trips recently with exactly the same issue and how it occurs

starts fine, driving well to destination, maybe 20miles - stop at destination for maybe 30mins - starts perfect, drive maybe 2 miles and lose drive completely, won't restart. Do a fuel pump purge (5 x accelerator pedal) and it will start after that with a good amount of white smoke and drives home absolutely fine.

My guess is air getting into the system somewhere?
Post #1031342 12th Apr 2024 11:03am
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