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Home > Technical > Four injector fails - new ECU needed? |
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I Like Chips Member Since: 25 Jun 2017 Location: Ascott Under Wychwood Posts: 1540 |
What are the specific codes |
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11th Jan 2020 6:38 pm |
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hamiltov Member Since: 08 Jan 2020 Location: Nottingham Posts: 22 |
I won't be able to get hold of specific codes until the Derby garage opens on Monday. I do recall that the garage said each of four injector were listed separately as misfiring. I am guessing therefore that we are looking at PO14, PO24,PO34 and PO44 based on my limited online research. |
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11th Jan 2020 6:49 pm |
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SYFL2 Member Since: 16 Jun 2012 Location: Sheffield Posts: 2594 |
Has fuel filter been changed ? |
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11th Jan 2020 7:27 pm |
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Worms Member Since: 31 Oct 2017 Location: Highlands Posts: 635 |
I wonder if it might be worth checking whether the garage has tried a proper power-down and reboot, before going to the expense of a replacement ecu? 2005 D3 2.7 Auto
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11th Jan 2020 7:39 pm |
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Steve D Member Since: 19 Jan 2013 Location: Essexshire Posts: 4109 |
It’s not the high pressure fuel pump breaking up and sending swarf to the injectors is it?
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11th Jan 2020 7:46 pm |
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Largered Member Since: 10 Jul 2016 Location: UK Posts: 1978 |
dwarf ..... carrying swarf ....... never thought of that
Get real. . |
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11th Jan 2020 7:48 pm |
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Sperly Member Since: 26 Dec 2019 Location: Warwickshire Posts: 195 |
For all four injectors to fail simultaneously is remarkable. I'm not doubting your mechanics ability, but I would suggest that the Freelander is correctly interrogated with the right dealer technician software - it would be well worth the diagnostic fee...otherwise it will become a bit of a tombola! |
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11th Jan 2020 8:40 pm |
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hamiltov Member Since: 08 Jan 2020 Location: Nottingham Posts: 22 |
Thanks for the feedback. My original mechanic checked the state of the filter, which was fine. I will ask the garage about a power down and reset before ordering a new ECU. Worth a punt. |
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11th Jan 2020 8:44 pm |
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hamiltov Member Since: 08 Jan 2020 Location: Nottingham Posts: 22 |
Sperly-My thoughts exactly, hence it has been moved to a Land Rover specialist now albeit an indie. But it is still showing the same fault hence I am reluctantly accepting the ECU verdict. A bloody expensive outcome but one that I don't think I can avoid |
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11th Jan 2020 8:50 pm |
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oldgeezer Member Since: 09 Apr 2011 Location: Wiltshire Posts: 1302 |
Actually very common, mostly due to contamination. Normally they seize but it doesn't show as a fault. fuel pressure faults can cause injector shut down. The injectors are normally powered by a relay, sometimes injector drivers in the ECU's fry and can shut the injectors down for saftey to prevent engine damage. Diesel injectors should never be laid down once used and are impossible to keep clear of airborne dust. A diagnostic tool is very rarely the answer for a fix either, experience, knowledge and understanding of the systems is key otherwise its just guess nostics ! These injectors run up to 150 volts,they way to test the ECU is to scope the injector output first. each injector should have an impedance of 170-200 k ohms I injector with a earth to the body will shut all four down. Piezo injectors secondhand are very very risky indeed, quite possible original were seized and secondhand units are damaged from transit or dirt. They now have running tolerances of just 2 microns. Maqy be worth taking your injectors to a diesel specialist first to confirm whether they are faulty. It will cost and not cheap but that will then eliminate or confirm closer diagnosis. Jaguar x-type sport gone Jaguar x-type 2.2d sport one of my best cars ever sadly gone Freelander 2 GS auto 2008 most unreliable ever ! gladly gone Freelander 2 GS manual 2013 only time will tell ! |
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16th Jan 2020 9:53 pm |
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hamiltov Member Since: 08 Jan 2020 Location: Nottingham Posts: 22 |
Latest update is that a new ECU was fitted and the problem remains. The garage have been able to get it to start and idle with two cylinders firing but once all four injectors are fitted it cuts out and diagnoses 4 injector failures. Next step for the garage is to mix and match my old set and new (from breakers) set of injectors.
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17th Jan 2020 9:47 pm |
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 |
With 2 injectors connected it works and with all 4 it wont??? With 2 different ECU's?
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17th Jan 2020 11:35 pm |
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hamiltov Member Since: 08 Jan 2020 Location: Nottingham Posts: 22 |
The wiring feeds have all been renewed to each of the injectors. I am hoping that oldgeezers suggestion that one bad earth in a single injector body can shut down the whole lot is the problem.
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18th Jan 2020 10:43 am |
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hamiltov Member Since: 08 Jan 2020 Location: Nottingham Posts: 22 |
Back on the road on Monday. The fault was found to be the tube return - LR051528. Filter had been clogged which knackered two of the injectors. A £40 part after all my hassle. Needless to say my final bill was over ten times that. Pleased to be back on the road though.
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30th Jan 2020 9:27 pm |
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