jimwise68
Member Since: 10 Jul 2021
Location: Essex
Posts: 10
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| Whirrs but won't start - Error "Flame detected prior..." |
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I bought my 2007 2.7 TDV6 in the summer and since the colder weather I noticed the FBH isn't working.
I have an iCarsoft so read the codes and got the "Flame detected prior to normal operation".
I've been researching on here and online to try things to get it started but still no joy.
The fuel line to the FBH was dry to I have syringed in some diesel and now it is full. I even syringed some into the FBH through the fuel in nozzle.
I have rapidly tapped the blue/white wire to see if the pump works and it is pumping fuel up.
Tonight I tried it all again and the FBH whirrs into life then after about a minute the whirr increases for about 10 seconds then it slows down to less of a whirr than it was at the beginning. Then I get the error again.
The iCarsoft live data shows the water pump on.
It shows the combustion fan on.
But the fuel preheater and fuel pump stays off.
The glow plug comes on, goes up to about1.18% then goes off.
What do you think it could be?
Do you think it could just. need a clean?
Any input and experience welcome, as really want to get this working.
thanks
Jim
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 20th Jan 2022 9:39 pm |
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Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
  
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Welcome!
Glowplug gets a higher resistance in time, so does not get hot enough…
If that happens, the fuel dosingpump, does not get a starting signal at all. That is why the fuel line has emptied in time…presumably…
Of the resistance is too high, cleaning does not help, only a new one does… Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc. 
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| 20th Jan 2022 10:47 pm |
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jimwise68
Member Since: 10 Jul 2021
Location: Essex
Posts: 10
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thanks for the reply.
How do I test the resistance?
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| 20th Jan 2022 10:58 pm |
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Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
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Toptip:
You can do some research yourself
Use the wiki
https://www.disco3.co.uk/wiki/Home
If you do that, you will find the subject FBH maybe, just maybe there is a workshop manual
And maybe, just maybe you will find this content.:
6.3.1.4 Electrical test of glowplug......................................... 603
Ps
The search button is also a very nice feature
https://www.disco3.co.uk/forum/search.php Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
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| 21st Jan 2022 7:24 am |
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jimwise68
Member Since: 10 Jul 2021
Location: Essex
Posts: 10
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I have that and read it. Don't think my multimeter does the 4-conductor measuring.
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| 21st Jan 2022 7:57 am |
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lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
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Iirc the glow plug is also the flame sensor?
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| 21st Jan 2022 8:51 am |
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Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
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Yes Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
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| 21st Jan 2022 8:56 am |
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jimwise68
Member Since: 10 Jul 2021
Location: Essex
Posts: 10
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Looks like it is going to be a strip down and clean, from what I have seen elsewhere.
Was hoping it was going to be something I could fix insitu.
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| 21st Jan 2022 9:19 am |
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Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
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"everybody"does that... 
a clean, CAN be a solution, but in my experience it seldom is THE solution..
atleast NOT in case of a raised resistance of the glowplug...
cleaning ONLY helps if it has done a few too much short runs (less than 10 minutes)
CAN be worth a try, but if not expect to spend a few quid for a new one.
they can be bought seperatly and rather cheap in Germany normally..
https://www.ebay.de/ & https://www.ebay-kleinanzeigen.de/
the germans have a "better" ebay version than "we" kleinanzeigen is without fee's involved Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
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| 21st Jan 2022 9:40 am |
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jimwise68
Member Since: 10 Jul 2021
Location: Essex
Posts: 10
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Thanks for your replies Motolab.
Looks like I either try the clean and check the glow plug. Or pay out for a multimeter that can do the 4-conductor measuring. Will a normal glow plug test work (testing with wire or normal multimeter)?
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| 21st Jan 2022 10:08 am |
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jimwise68
Member Since: 10 Jul 2021
Location: Essex
Posts: 10
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So I just stripped it down, gave it a clean and it still isn't working. 
Do you think it could be the glow plug that needs replacing?
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| 21st Jan 2022 9:12 pm |
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Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
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Sorry… but didn’t you read what i wrote?
It seems that people only read what they want to read these days…. Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
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| 21st Jan 2022 10:59 pm |
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jimwise68
Member Since: 10 Jul 2021
Location: Essex
Posts: 10
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I did read what you put lol
But I could do a clean easily, as ordering a part that might not be needed would be a waste.
I wasn't sure if your reference to spending a few quid on a new was for a complete FBH unit. Hence my question about can you buy just a glow plug. Ive done a google search and can only find glow plugs for other Webasto models. Not the Thermo V. So I'm still looking.
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| 21st Jan 2022 11:13 pm |
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Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
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I think, this one will fit
https://www.ebay.co.uk/itm/WEBASTO-1315949...634-2357-0
Though from a slightly later model, and i did not test it yet..
It is “high” season now for FBH parts, so they are scarce and there fore more expensive now.. Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
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| 22nd Jan 2022 12:08 am |
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aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2463
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I always find the burner cups get a hole in them so it may be wirth buying a complete burner unit and glow plug Andrew
D3 2.7tdv6 2005
D4 3.0 SDV6 Commercial died and gone to LR heaven
D5 3.0 SDV6 HSE
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| 22nd Jan 2022 8:39 am |
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