 | Home > Technical > TD5 Air Flow Sensor failing again.... |
 
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| derbywill Member Since: 25 Mar 2010 Location: Derbyshire Posts: 539   
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Out of interest what type of air filter are you using?
It’s strange to have one failing so soon but only being 8months old it will be warranty. Cheers Will 2005 90 XS 1954 86'' Series 1 tilt |
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27th Apr 2021 6:57am |
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| 90GTR Member Since: 05 May 2020 Location: London Posts: 198 
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Should be an ITG panel filter and prior to that a stock panel filter.
Yes assume its under warranty, unfortunately that process I think will be long-winded.... |
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27th Apr 2021 8:09am |
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| derbywill Member Since: 25 Mar 2010 Location: Derbyshire Posts: 539
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Has the filter been re oiled? I know with the K&N type if there is too much oil on them it kills the MAF.
Cheers Will 2005 90 XS 1954 86'' Series 1 tilt |
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27th Apr 2021 8:12am |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11240  
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That sounds like a smoking gun to me. Much better to stick with the OE filter, plus tests have shown them to work better, too. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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27th Apr 2021 8:33am |
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| BaronDefenders Member Since: 28 Jun 2019 Location: London/Cotswolds Posts: 806 
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Siemens VDO units are what JLR uses.
Oiled filters can cause MAFs to die eventually. Up to you, but I’d either replace the MAF and stick in a paper air filter, or just unplug the MAF and leave it. Charlie 1949 Series 1 80 (SOLD) 2002 Td5 90 (SOLD) 2008 Freelander 2 (SOLD) 1958 Series 2 88 Pastel Green (2019 LR Legends Best Restored) 1983 V8 110 Limestone (Previously owned by Tom Sheppard MBE) 2004 Td5 90 Santorini Black (Td5INSIDE Powered & Rebuilt by CSK) 2012 Puma 110 Zermatt Silver (Overlanding Build) Instagram: @BaronDefenders |
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27th Apr 2021 8:49am |
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| 90GTR Member Since: 05 May 2020 Location: London Posts: 198
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Thanks all
ITG panel filters I'm unaware if that needs oiling (not sure it would if its foam), JE never mentioned anything when they installed it (it's fitted as part of their tune). I had some time spare earlier so took a look at the sensor and filter... both appeared clean and fine. Anyhow given that I was planning to order a replacement sensor i.e. having little to lose, decided to spray the sensor with a quick drying / non residue contact cleaner and reset the battery at the same time. Car seems to be back to normal..... how long it'll last who knows, but if so will just order another sensor. Curious if the EGR valve can have an impact? |
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27th Apr 2021 5:16pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11240
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The EGR is downstream of the MAF, so no. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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27th Apr 2021 9:40pm |
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| Pacha Member Since: 23 Feb 2020 Location: North Yorkshire Posts: 772 
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ITG are oiled - |I suspect that might be the cause?. Rgds. Chris |
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27th Apr 2021 9:52pm |
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| Ianh Member Since: 17 Sep 2018 Location: Essex Posts: 1757
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As others state , looks like oil contamination of the sensor, and cleaning will resolve. I use this dedicated maf cleaner once a year .https://products.liqui-moly.com/air-flow-sensor-cleaner-2.html, you may need to do every six months if you keep the non standard air filter. |
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27th Apr 2021 10:20pm |
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| 90GTR Member Since: 05 May 2020 Location: London Posts: 198
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Thanks for responses.
Does sound like it could be the culprit, will update this thread after 1000 mi with whether its still ok and not just a quick fix.... If so, will buy a can and just include it as part of the maintenance schedule. I wonder now if the other genuine JLR air flow sensor (again less than 3k / 9m) was just in need of a quick clean, despite using a stock air filter (although JE did comment this was slightly dirty at the time). |
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27th Apr 2021 10:34pm |
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| grafty99 Member Since: 15 Aug 2012 Location: North Devon Posts: 4784 
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ITG filters should be oiled, I have a can of ITG oil spray from the old one on my RRC. My 90 also used to go through MAF sensors regularly when I was running a performance air filter (green cotton I believe). Been on the same MAF sensor for years since returning to genuine filters and noticed absolutely no performance difference
 2002 90 Td5 Station Wagon
1990 Vogue SE Triumph Tiger Explorer 1200 Td5 90 Thread http://www.defender2.net/forum/topic50767.html Tdi 110 Thread https://www.defender2.net/forum/topic69562.html RRC Thread http://www.defender2.net/forum/topic54492.html Instagram http://www.instagram.com/george_grafton |
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27th Apr 2021 10:46pm |
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| Pacha Member Since: 23 Feb 2020 Location: North Yorkshire Posts: 772
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Having tried most 'performance' filter types over the last 30 odd years I think the placebo effect is strong.
In reality, they sometimes cause more issues than they fix. Rgds. Chris |
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27th Apr 2021 10:57pm |
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| 90GTR Member Since: 05 May 2020 Location: London Posts: 198
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Naturally given JE's link to ITG, they were only ever going to recommend and fit one type of filter with their tune and tune+.
This TD5 is otherwise stock and I suspect quite restrictive. Shame it just becomes very noticeable when the throttle response declines and that's my biggest issue with the failing sensor. Given the Defender is not a vehicle for me to chase numbers with, so long as the car can run well continuously, it's not that important to me which air filter is in there. The other JE truck is less restrictive and runs well. When I can get hold of the Nanocom to buy, I will run the two back to back and see if the air flow sensor values at idle and greater revs are substantially different. That's very much a bit of geeky information for me on a quiet Sunday.... Last edited by 90GTR on 28th Apr 2021 10:45am. Edited 1 time in total |
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27th Apr 2021 11:30pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11240
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If you're interested in the geeky side of it (and who isn't?) then search out the posts by Pete Bell of BAS on comparative rolling road tests that he performed with different types of filters and also different snorkels. It's eye opening. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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28th Apr 2021 9:36am |
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