 | Home > Td5 > Engine running rough and died |
 
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| HansT Member Since: 25 Dec 2012 Location: Mariefred Posts: 173   
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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. |
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15th Apr 2017 9:34am |
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| bob neville Member Since: 30 Apr 2009 Location: Marbella Posts: 3248  
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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 ! |
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15th Apr 2017 9:54am |
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| HansT Member Since: 25 Dec 2012 Location: Mariefred Posts: 173
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Good idea Bob! I will do that. Thanks.
/Hans |
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15th Apr 2017 9:56am |
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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
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15th Apr 2017 10:52am |
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| HansT Member Since: 25 Dec 2012 Location: Mariefred Posts: 173
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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 |
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16th Apr 2017 3:06pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20294 
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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? ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️ |
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16th Apr 2017 3:12pm |
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| HansT Member Since: 25 Dec 2012 Location: Mariefred Posts: 173
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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.
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16th Apr 2017 3:35pm |
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| bob neville Member Since: 30 Apr 2009 Location: Marbella Posts: 3248
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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 ! |
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16th Apr 2017 4:23pm |
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| HansT Member Since: 25 Dec 2012 Location: Mariefred Posts: 173
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I will start by changing the fuel filter to see if there is any sludge in the filter.
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16th Apr 2017 5:26pm |
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| HansT Member Since: 25 Dec 2012 Location: Mariefred Posts: 173
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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 
/Hans |
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20th Apr 2017 4:22pm |
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| JWL Member Since: 26 Oct 2011 Location: Hereford Posts: 3443  
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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
Found it! http://www.defender2.net/forum/topic28189....+fuel+pump |
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20th Apr 2017 4:41pm |
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| HansT Member Since: 25 Dec 2012 Location: Mariefred Posts: 173
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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 |
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20th Apr 2017 6:30pm |
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| MadTom Member Since: 10 Sep 2013 Location: Olomouc Posts: 616  
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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  |
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21st Apr 2017 5:57am |
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| JWL Member Since: 26 Oct 2011 Location: Hereford Posts: 3443
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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
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21st Apr 2017 1:17pm |
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