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HansT



Member Since: 25 Dec 2012
Location: Mariefred
Posts: 173

Sweden 2004 Defender 110 Td5 SW Belize Green
Good news!

After fiddling with the relays, the engine started and runs fine on idling. Have no idea of what caused the problem and what I have done to fix it. Deleted the fault codes?

However, so far I have not dared to take it on a test drive... Do you think it is ok? If it fails again I will be back here again with more questions.

Thanks guys for your help.
Post #616942 15th Apr 2017 9:34am
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bob neville



Member Since: 30 Apr 2009
Location: Marbella
Posts: 3247

Spain 2001 Defender 90 Td5 SW Epsom Green
If you moved the relays and it worked then it is probably the contacts the relay legs slot into.

To be safe it may be best to remove the relays and close the receiving contacts a bit with a pair of needle nose pliers.

Bob 2015 Jaguar XE240 R Sport - goes like ....... !!
2013 Defender 90 CSW - sold
2009 Defender 110 Double Cab - sold
2001 TD5 90 CSW - offroad project - sold to a forum member
2011 Porsche Boxster - for the sunny days !
Post #616947 15th Apr 2017 9:54am
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HansT



Member Since: 25 Dec 2012
Location: Mariefred
Posts: 173

Sweden 2004 Defender 110 Td5 SW Belize Green
Good idea Bob! I will do that. Thanks.

/Hans
Post #616948 15th Apr 2017 9:56am
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19449

United Kingdom 
Great news. A few members here have had similar issues with the Relays on occasion. Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #616950 15th Apr 2017 10:02am
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554

Good news, the old fiddling with relay ploy work again Thumbs Up
Post #616960 15th Apr 2017 10:52am
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HansT



Member Since: 25 Dec 2012
Location: Mariefred
Posts: 173

Sweden 2004 Defender 110 Td5 SW Belize Green
Not so good news.

Today it started fine and runs good on low and high idling. So I got brave and took it for a spin around the block. I only got a couple of 100 m when it starts running rough again so I quickly return to base.

Hook up the Nanocom but no fault codes. And I can hear a click from the fuel pump relay and a short whirr from the pump (I think). Should the pump be running continuously?

/Hans
Post #617240 16th Apr 2017 3:06pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19449

United Kingdom 
The click is likely the Relay just engaging or disengaging.
The whirr not so good, are you sure it isn't a fuel pump failiure? Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #617242 16th Apr 2017 3:12pm
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HansT



Member Since: 25 Dec 2012
Location: Mariefred
Posts: 173

Sweden 2004 Defender 110 Td5 SW Belize Green
I also suspect the fuel pump but could it still run fine on idling with a faulty pump? Are there any way to know for sure as I understand that it is a major job to drop the tank to replace the pump. I like to eliminate other possibilities before I replace the pump.
Post #617248 16th Apr 2017 3:35pm
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bob neville



Member Since: 30 Apr 2009
Location: Marbella
Posts: 3247

Spain 2001 Defender 90 Td5 SW Epsom Green
Could be sludge in the fuel tank, that may explain why idle is OK.

Unfortunately with sludge in the tank or fuel pump the tank has to be dropped.

Bob 2015 Jaguar XE240 R Sport - goes like ....... !!
2013 Defender 90 CSW - sold
2009 Defender 110 Double Cab - sold
2001 TD5 90 CSW - offroad project - sold to a forum member
2011 Porsche Boxster - for the sunny days !
Post #617252 16th Apr 2017 4:23pm
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HansT



Member Since: 25 Dec 2012
Location: Mariefred
Posts: 173

Sweden 2004 Defender 110 Td5 SW Belize Green
I will start by changing the fuel filter to see if there is any sludge in the filter.
Post #617259 16th Apr 2017 5:26pm
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HansT



Member Since: 25 Dec 2012
Location: Mariefred
Posts: 173

Sweden 2004 Defender 110 Td5 SW Belize Green
Today I changed the fuel filter. First I drained about 1/2 litre from the filter to check for contamination. Only a very small amount of particles and maybe a teaspoon of water. The filter has been fitted for a year so I would consider that to be normal and should indicate that it is not sludge in the tank that is causing the problem.

After fitting the new filter, I turned on ignition a pressed the throttle five times to start the purging process. The relay clicked and the engine lamp started to flash but not a sound from the pump. After a while the relay clicked off an on several times (to restart the purging process?) but still no sound from the pump.

I gave up and started the engine which run fine on idle but after about five minutes started to misfire and then died.

Are there any other checks or tests that I should do before dropping the fuel tank and change the fuel pump? It is not a job I look forward to do Big Cry

/Hans
Post #618173 20th Apr 2017 4:22pm
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JWL



Member Since: 26 Oct 2011
Location: Hereford
Posts: 3443

England 2002 Defender 110 Td5 SW Coniston Green
I'd be inclined to change the injector seals and washers as a matter of course, it's another factor out of the equation. You can get poor running issues and not get diesel in the oil with poor washers but if you get the slightest whiff of diesel fumes if you poke your nose over the open oil filler cap then it's a definate good plan to change them.
On my 110 I made an opening in the rear loading area floor to gain access to the pump as I had no desire to drop the tank on mine, taking out all the towbar bracketry had no appeal to me so out with the grinder was the option I took. There is a thread on here that shows what to do, I'll have a look to see if I can find it Thumbs Up

Found it!

http://www.defender2.net/forum/topic28189....+fuel+pump
Post #618176 20th Apr 2017 4:41pm
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HansT



Member Since: 25 Dec 2012
Location: Mariefred
Posts: 173

Sweden 2004 Defender 110 Td5 SW Belize Green
The opening of of a hole in the floor looks tempting to me. Any drawbacks of cutting away the reinforcement ribs under the floor?

/Hans
Post #618192 20th Apr 2017 6:30pm
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 556

Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
Before cutting hole to get the pump out from tank, or replacing injector seals, you can test the fuel pump - best with pressure gage connected to the input fuel hose to the engine, or at least a bit when you remove the input hose from engine a place it in a clear bottle. Good working fuel pump delivers approx. 3l of diesel in a minute. So it is quite a bit of fuel. If not, check the wires/relays and than fuel pump out.
Cutting hole is the best way, as the pump can die in future again, and when it happens, the fuel tank is for sure full of diesel. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #618290 21st Apr 2017 5:57am
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JWL



Member Since: 26 Oct 2011
Location: Hereford
Posts: 3443

England 2002 Defender 110 Td5 SW Coniston Green
I've had no issues with cutting away part of the ribs under the floor but then again I have got a sheet of plywood on the floor. I'd reccomend having a ply liner on the floor if you were chucking heavy objects in whether there was a hole cut in the floor or not Thumbs Up
Post #618395 21st Apr 2017 1:17pm
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