 | Home > Td5 > misfire at idle |
 
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| mk1collector Member Since: 17 Sep 2009 Location: West Yorkshire Posts: 6772   
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Check oil level for diesel in the oil as it might be injector seals and washers going.
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5th Nov 2014 6:35pm |
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| bob neville Member Since: 30 Apr 2009 Location: Marbella Posts: 3248  
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Oil in the ECU loom could cause the miss fire as well as the crank sensor but most likely the first if it is not under power.
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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5th Nov 2014 6:45pm |
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| Turbotcharged Member Since: 03 Nov 2014 Location: Kernow Posts: 29 
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Checked oil level..a tad high but no smell of diesel..possible overfil by previous owner...have got the spannerist changing the fuel filter and checking the fuel system before I get round to the injectors....it does not make the high whine when cold and on start up...it fires up instantly ..just when she gets warm...pitch increases..wondering if its air in system ?
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5th Nov 2014 8:14pm |
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| mk1collector Member Since: 17 Sep 2009 Location: West Yorkshire Posts: 6772
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One of the common places fro getting air in the fuel system is injector seals and washers. Cheap to do aswell.
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5th Nov 2014 8:23pm |
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| NickEJ Member Since: 24 Nov 2012 Location: Ljubljana Posts: 152  
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Before you do anything just try putting a decent injector cleaner into the tank and run it. I had similar symptoms a few months ago on my 2004 Td5 so changed filter, checked FPR etc., and was about to go to town on the injectors but thought I'd give the cleaner a go. Worked straight away. Has run very sweetly since. You never know, no harm in trying.
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5th Nov 2014 9:01pm |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5805 
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If you are talking about a very slight misfire, when going from speed to idle suddenly, then I think it's normal for Td5's to do this. Mine did and it got to 167 thou miles before I sold it. Any body else noticed this? It did it in standard form and with two different tuners maps on it.
Andy |
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5th Nov 2014 9:32pm |
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| JWL Member Since: 26 Oct 2011 Location: Hereford Posts: 3443 
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Mine does this when I have been driving steadily and stop at a red light, the engine will run rough at tickover when I'm at a standstill. It can be improved on mine by fitting a new MAF sensor and then gradually comes back as the sensor becomes dirty again.
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5th Nov 2014 10:09pm |
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| Turbotcharged Member Since: 03 Nov 2014 Location: Kernow Posts: 29
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Have purchased the seals (genuine most expensive bits of copper on earth)...am going to try some injector cleaner too befor I fit them..you nevewr know...the thing was undriveable over 50 ..was thinking polybush kit...suspension packages...blah blah...had the wheels balanced...different vehicle! Got to say though seals appear to be heading for a change.
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5th Nov 2014 11:02pm |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5805
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Rubber seals as well as the copper ones?
It won't be the injector seals, as when they fail they allow air to travel backward through the fuel system, which can't happen whilst it's running. Failed injector seals give poor starting, and noisy pump before running problems. Andy |
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5th Nov 2014 11:16pm |
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| Turbotcharged Member Since: 03 Nov 2014 Location: Kernow Posts: 29
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I hope it is not the seals...Pump has begun to whine at higher decibel level than normal....it primes ok..she starts on the button gets rough ish at the high end of rev range (70-75mph) ...but never had a TD5 defender before (Disco 1 300TDI) so might be normal and I am used to quiet cabins..hence the fuel filter ..The sound when she is cold from the pump is 'normal' ....once we get going and warm..pump sounds like its increasing in revoloutions...higher pitched tone...no loss of power...so seals must be suspect? Motor has only done 70K
Thanks for all the suggestions BTW much appreciated |
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5th Nov 2014 11:29pm |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5805
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Just checking before you do job that you've got five copper washer and five rubber o rings
Andy |
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5th Nov 2014 11:33pm |
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| Turbotcharged Member Since: 03 Nov 2014 Location: Kernow Posts: 29
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Yes full kit of genuine seals...
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6th Nov 2014 9:02pm |
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| Turbotcharged Member Since: 03 Nov 2014 Location: Kernow Posts: 29
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on the subject of Seals..my wife runs a diving business...can get a full set of salty seals if required!
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8th Nov 2014 11:40am |
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| Turbotcharged Member Since: 03 Nov 2014 Location: Kernow Posts: 29
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Filled up the tank put in some o dat cleaner...and...its gone quiet ??????
I think its the fuel level more than the cleaner??? |
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9th Nov 2014 8:16pm |
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