 | Home > Td5 > Broken MAF i think |
 
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| adafish Member Since: 30 Mar 2009 Location: atherstone Posts: 1384   
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just get a genuine one, no need for uprated one. Our cars run OE MAF's with stg3 kits on them. Putting Dreams on Drives at JLR Solihull..
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21st Jun 2013 8:50am |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6093 
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There's thread on here somewhere, where Porny posted the readings that a healthy MAF should show.
It's about 50 kg/hr at idle and up to 550~600kh/hr when on full chat. With the engine off (but ign on) I think it should show about 4.5kg/hr If it's showing 0 then it's dead. although remove the plug from it, give it a clean/spray in WD40 and re-insert. I thought I had a dead one, bought a replacement, and since unplugging the old one and re-fitting, it's been fine... so at least I've got a spare now! Makes a huge difference to performance. The nanocom can show this reading in real time... as in, when the engine is running. either on stand alone or if the nano is plugged into a laptop. I prefer having it on a laptop, you can see so much more, and it's clearer, but if you're just after one particular reading, as in the MAF data, then stand alone is fine. What version of nano have you got? mine is the old Mk.1 but works fine. |
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21st Jun 2013 9:10am |
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| johnnyd Member Since: 13 Apr 2013 Location: Chippenham Posts: 1006 
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diesel_jim ......is it fused separately ?
Nanocom is the Newer Evolution from BBS direct with 10% forum discount, i don't think it has PC software anymore? JD edit anyone know where i can get one in Bristol today, Im in Clifton ATM ? 2008 TDCi 2.4 XS CSW |
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21st Jun 2013 9:12am |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6093
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Yes, it goes through fuse 37, 15amp
Which appears to be a "lone" fuse (i.e, not in the underseat or passenger fusebox) so looking at the wiring diagram, i'd suggest it was the fuse that's in the loom right next to the ECU/relays under the drivers seat. It also feeds the EGR valve. it is powered from the main ignition relay (and cut-off by the inertia switch on the bulkhead) Looking at the diagram; if the fuel pump is pumping, then there should be +12v to the +ve side of the fuse holder. |
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21st Jun 2013 10:08pm |
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| ZeDefender Member Since: 15 Sep 2011 Location: Munich Posts: 4731  
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You can get MAF cleaner now - leaves no residue:
http://www.amazon.co.uk/Mass-Flow-Sensor-C...or+cleaner I've cleaned several over the years and they usually come "back to life"  Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing... |
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21st Jun 2013 10:36pm |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6093
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I cleaned mine out today with electrical contact cleaner, seems to be very similar stuff.
will check with the nanocom tomorrow as to whether i've killed it!   |
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21st Jun 2013 10:40pm |
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| johnnyd Member Since: 13 Apr 2013 Location: Chippenham Posts: 1006
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OK i have volts on the contacts to the MAF so that looks good, i inspected the MAF closer, and all i can see is a piece of thin metal in there, i see no components or wire, should there be anything on the metal plate ?
JD 2008 TDCi 2.4 XS CSW |
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22nd Jun 2013 7:46am |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6093
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The metal is in a kind of "P" shape with a loop inside it. althugh different makes may look different.
Here's a random google image of one, you can see the sensor poking down: [img]http://desmond.imageshack.us/Himg62/scaled.php?server=62&filename=photo1pse.jpg&res=landing[/img] |
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22nd Jun 2013 8:04am |
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| johnnyd Member Since: 13 Apr 2013 Location: Chippenham Posts: 1006
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Yeh i think the wire is missing from mine
 That might be why its not working 
Is it worth me doing a remap with it broken do you think ? I will try to find a parts place in Chipnum this morning, but it may be difficult. JD 2008 TDCi 2.4 XS CSW |
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22nd Jun 2013 8:10am |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6093
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You really want the engine in tip top condition before you try making it go faster.
Try Harfords. Or TH Whites parts dept are usually open until 13:00hrs. |
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22nd Jun 2013 8:35am |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5720 
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Can't you borrow one from any other td5?
Andy |
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22nd Jun 2013 8:40am |
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| johnnyd Member Since: 13 Apr 2013 Location: Chippenham Posts: 1006
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I did try harfords, closed, didn't know about T H white.....and they have a patten one, not a landy one, for 44 quid, I know everyone says buy original, but they say these are OK any one heard of them?
Lol fixed spelling mistakes....... I think it might be pattern....... 
JD 2008 TDCi 2.4 XS CSW |
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22nd Jun 2013 8:47am |
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| ZeDefender Member Since: 15 Sep 2011 Location: Munich Posts: 4731
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My philosophy is always go original for "mystery components" (ones I can't understand) - that way if there's still a problem you can be fairly certain the fault lies elsewhere. Pattern parts always leave an element of doubt...
W.r.t. remapping, wait until the engine's working before you start confusing it more. Pete Bell indicated that remaps are "adaptive" to the engine parameters, which is another good reason to wait. Tell someone you love them today because life is short. But shout it at them in German because life is also terrifying and confusing... |
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22nd Jun 2013 9:54am |
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| johnnyd Member Since: 13 Apr 2013 Location: Chippenham Posts: 1006
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I went for the Pattern, its guaranteed for 1 year at T H White
And.......MAF now works and shows airflow on the Nanocom, and it drives better too
Many Thanks all JD 2008 TDCi 2.4 XS CSW |
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22nd Jun 2013 10:53am |
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