 | Home > Td5 > Fuel pump failure ? |
 
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| TJH1985 Member Since: 22 Aug 2016 Location: Midlands Posts: 238  
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When mine failed it was silent, the 90 started and ran and was drivable just without any power, you could probably excelerate up to about 40/50 slowly. The tell tale sign on mine was the lack of prime when you turned the ignition on.
I pulled the plug from the pump and checked it had 12v etc which you can do without dropping the tank, you can hear the relay click when you turn on the ignition as well. |
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2nd May 2018 5:52am |
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| mk1collector Member Since: 17 Sep 2009 Location: West Yorkshire Posts: 6769  
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It could be injector seals and washers. It's reasonably cheap to get these changed so might be worth trying it before going down the pump route. If your changing the washers and seals only use genuine ones. Ray
My build thread http://www.defender2.net/forum/topic17615.html |
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2nd May 2018 8:32am |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
having replaced fuel pump on my 03 plate 90 the old pump had been noise for more years than i can remember stared ok have replaced leaking fuel presser regulator cold snowy November back 2010 and injector seal in 2015 lube oil level in sump slowly increases in between oil service also changed clutch and window seal and work on body work too.
2018 18 Feb go to north Devon and Pollock and the hill and Exmoor  the landy struggled to get up the Pollock hill  fuel pump making more noise than normally full tank
on retune back to Dorset time too investigate tested MAF and turbo wast gate and so on, MAF readings low ( 46 at idle and not 60 LR 03 factory fitted unit so order replacement, time to test fuel presser at the engine needs to be 4 BAR post FPR, made up tested kit see below  Click image to enlarge Click image to enlarge kit fits in fuel line after fuel cooler ran engine with the test kit in place 2.1Bar no bubbles air leak down to local LR independent for new pump
removed old pump Click image to enlargeand fund this in the filter at bottom of the pump Click image to enlarge Gas oil fuel bug before fitting new pump pump out fuel from the tank and clean out in side the tank and then fitted new pump and filter refilled tank post fuel perjure retested fuel presser 4 BAR  and little pump noise
rear tub fuel pump hatch made and fitted 1 in 4 hills no problem 
Sum time later bit spare time check the and clean old fuel pump removed bottom plastic part of the pump and find that small filter blocked up with more black gunk (fuel bug) clean it all out and ram pump with clean fuel and fuel bug treatment for 2HR set up test rig and checked presser stage 1 (0.5 Bar) stage 2 (8 bar) and a lot less pump noise going to keep old pump for a spare Last edited by dorsetsmith on 2nd May 2018 1:02pm. Edited 3 times in total |
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2nd May 2018 10:47am |
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| davew Member Since: 02 Jan 2012 Location: North Yorkshire Posts: 888 
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That seems an odd place to measure the pressure, in the return to the fuel filter rather than between the high pressure pump and regulator, are you sure that's where you should measure it ? I'd not expect to see a lot of pressure there, certainly not fuel rail pressure. http://www.yorkshireoffroadclub.net/
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2nd May 2018 11:44am |
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| gazman Member Since: 17 Aug 2015 Location: Liverpool Posts: 652 
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i measured mine on the feed to the fpr where the temp sender sits.
the black crap could also be carbon from the injector washers passing. Mine was 2014 - current ..... 2003 defender td5 90 (my car) 2009 - current .... 2005 zx10r |
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2nd May 2018 2:53pm |
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| LinDens90XS Member Since: 24 Feb 2012 Location: Merseyside Posts: 83 
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Hi Dorsetsmith, mine is an 03 90 as well and already had replacement pump. Have been toying with the idea of cutting an inspection hatch but unsure where to start cutting a or how large the hole should be. Would be obliged if you could let us know the measurements for your set up, and also any problems in doing it. Thanks in advance. Regards
Dennis. |
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7th May 2018 8:09pm |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
have look old post i used information from it
http://www.defender2.net/forum/post211294.html |
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8th May 2018 8:06am |
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| LinDens90XS Member Since: 24 Feb 2012 Location: Merseyside Posts: 83
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Thanks for that. appreciated. Regards
Dennis. |
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9th May 2018 9:14pm |
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| Screbble Member Since: 26 Apr 2015 Location: Lancashire Posts: 2106 
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Looks like mine has just inherited the same symptoms. Perfectly alright until this morning when I couldn't hear the priming/purging when the ignition turned on. No warnings or concerns previously - working fine. Power to the plug, but no sign of sound of life. It still starts/runs, which surprised me, but given your comments TJH1985 it seems it's the norm. So it oooks like it'll drive up to about 40/50 which is handy to know as it'll get me to the local garage if I can't get the flipping fuel tank off  |
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14th Jul 2018 2:30pm |
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| TJH1985 Member Since: 22 Aug 2016 Location: Midlands Posts: 238
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With a bit of force the plate covering the tank comes out quite quickly, mines been out twice now once to fix a leaking breather hose and second for the fuel pump, must have taken me a hour the first time to get it out and then 10 minutes the second time when you have a little more confidence. Although I have modified the plate now so that it’s bolted up from underneath as it makes life so much easier
Good luck
Click image to enlarge |
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14th Jul 2018 5:09pm |
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| Screbble Member Since: 26 Apr 2015 Location: Lancashire Posts: 2106
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Thanks for the advice TJH1985 and the idea of modifying the plate so it is fitted from underneath - should have been designed like that in the factory
In an attempt to make life easier when I come to do it, I removed all of the mounting nuts/bolts from the plate today and replaced with new ones that I had in the garage. I also replaced the tow bar brackets and the jubilee clips on the pipes. All new and greased so it should make life easier
Just out of interest, how long will it run without the pump working? You suggested it'll get up to a low speed but will that be the case until the new pump is fitted - i.e. can I do the local runs until the pump arrives on Tuesday? Cheers, Will |
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14th Jul 2018 7:31pm |
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| TJH1985 Member Since: 22 Aug 2016 Location: Midlands Posts: 238
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I maybe did 80 miles on mine without issue, it went on holiday so used it to get back to the cottage and until we could get it recovered. You wouldn’t want to take it on a major road that’s for sure
 I guess it would only stop if air gets in the system because the pump has the job of purgeing?
It’s not my main car, so was a few weeks until I got around to it and it still started and drove at that point. |
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14th Jul 2018 7:46pm |
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