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Author Topic: DPF fuel vaporizer problems  (Read 9968 times)

Offline drjaking

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  • Model: Galaxy Mk3 Auto
  • Spec: 2010
  • Region: South East
DPF fuel vaporizer problems
« on: May 08, 2017, 05:49:50 PM »
Hi all, back after a lovely couple of years with no problems! I initially came here with a recurrent P269F error code, which always went away and came back after a few months. It signifies "Exhaust Aftertreatment Glow Plug Circuit/Open". After a lot of reading (mostly on Mondea forums!) this is a part of the DPF system which injects and heats fuel into the DPF to get the regeneration process hot. It's part of the Euro 5 implementation and seems to be the weak link - in city driving it can get clogged up and/or have electrical problems.

Now mine seems to have finally given up the ghost. The warning is coming on every journey, and is now "confirmed" - the orange engine light also comes on. I've cleared it a couple of times with Forscan to see if it reappears and it does, so I'm going to have to deal with it.

Cost of a new vaporizer is about 180. Alternatively, if I can stomach a DIY job it's possible to get the glow plug part for about 40, but that looks a bit more challenging. It looks like a pretty quick job  to swap the unit - the only challenging bit looks like priming it with fuel. I'm tempted, but haven't got access to ramps.

I wondered if anyone here has had experience of this issue? It seems to be a fairly common fault and several ppl reported having been erroneously charged to replace the whole DPF instead, which then clogs up again.

Cheers,

John

Offline mike wilson

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Re: DPF fuel vaporizer problems
« Reply #1 on: May 09, 2017, 09:08:29 AM »
Something else worth checking is the condition of the fuel feed hoses.  These seem to be a common failure point.  OEM replacements are wallet-shattering but some simple fuel hose can be used to replace them.  Even if the glowplug has failed, it may be linked to deteriorating fuel hoses.  If you're lucky, it will be just them.

Offline drjaking

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Re: DPF fuel vaporizer problems
« Reply #2 on: May 09, 2017, 09:17:54 AM »
It sounds like you've got direct experience of doing this. Do you think a reasonably experienced diyer could manage it? Any practical tips?

The main thing putting me off is that the only way I have of raising the car is driving the front wheel up a kerb, would that work (and which side)?

Do I need to isolate the fuel supply, or can I just pull the supply pipe off the pump safely?


Offline mike wilson

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Re: DPF fuel vaporizer problems
« Reply #3 on: May 10, 2017, 11:26:34 AM »
Not so much real experience but I did a huge amount of research before I bought my car.

Some interesting topics:
electrics
http://www.talkford.com/community/topic/223673-fuel-vaporiser-fuse/
versions of DPF
http://www.talkford.com/community/topic/236704-20-tdci-dpf-problems-p244c/
pictures of bits
http://www.talkford.com/community/topic/314066-dpf-error-code-p2463/
hose info
http://www.talkford.com/community/topic/232717-rubber-hoses-from-dpf-filter/

There is also some information there that the hoses are double walled, with a much stronger inner part, that resists charring.  You only need to change them if they actually split.  If you do use fuel hose, make sure the lines are tied well away from high temp parts.

Most people seem to pass their vehicle, with some tubing, to a garage to fix.  It seems that access to one end of the fuel lines is problematical when you are lying underneath.

Looks like you can pull the delivery line off the pump but not the pump supply line.

Also looks like refurbishment of the injector unit is not easy.  I suspect that baked-on carbon  in the injection orifice will be the problem.


Offline drjaking

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Re: DPF fuel vaporizer problems
« Reply #4 on: May 10, 2017, 02:32:28 PM »
Very useful stuff, thanks. I really wish I had access to a lift!

Offline mike wilson

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Re: DPF fuel vaporizer problems
« Reply #5 on: May 11, 2017, 09:17:51 AM »
It would be my number one purchase, if I had the space.  I'm thinking of going into business with a lift hire premises once I retire.  There must be plenty of people who would pay a reasonable fee to be able to use one.  Turn up, hoist your vehicle, access to air, bring your own tools. Small extra charges for air access and waste disposal.  Pay by the hour with discount for whole days.

Offline johnnyroper

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  • Model: Galaxy Mk2
  • Spec: 02 tdi 115 ghia
  • Region: South West
  • Country: United Kingdom
Re: DPF fuel vaporizer problems
« Reply #6 on: May 11, 2017, 12:48:52 PM »
Already on offer in some places I used this place last year to change suspension on discovery 3,the hourly cost includes power,air,tools and rubbish disposal aswell as ramp hire.

Offline mike wilson

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Re: DPF fuel vaporizer problems
« Reply #7 on: May 12, 2017, 08:37:01 AM »
Nothing round here, though.  My luck is that they will be on every street corner by the time I'm ready.

Offline drjaking

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Re: DPF fuel vaporizer problems
« Reply #8 on: May 12, 2017, 10:41:28 AM »
There's a place in Acton called Pitstop. I was tempted - it's 20/h for a lift with tools. But Google reviews are not encouraging and if they are actually badly run I would not want to get under one of their lifts!

Back on my problem, I'm puzzled about why the "open circuit" error P269F would be intermittently coming on over several years but not causing any problems. The DPF has clearly been regenerating fine and has never thrown an error to say otherwise. I don't know how glow plugs fail, but I'd have thought they would only go open circuit once and then never work again. Is it possible this is actually a wiring problem?

Offline johnnyroper

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Re: DPF fuel vaporizer problems
« Reply #9 on: May 12, 2017, 02:19:04 PM »
http://ramp-it-up.co.uk/home/

Forgot to add the link in earlier post.

Offline KingyMAK

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Re: DPF fuel vaporizer problems
« Reply #10 on: May 18, 2017, 04:05:17 PM »
I see your North East;

There's one in Washington, Crowther.


Offline mike wilson

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Re: DPF fuel vaporizer problems
« Reply #11 on: May 19, 2017, 08:43:34 AM »
Just next door then.....

I'll check to see if it's still functional this weekend.  There's a local classic club that has facilities for members.  But most of the members are crashing bores, sadly.

Many thanks for the heads up.

Offline drjaking

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Re: DPF fuel vaporizer problems
« Reply #12 on: May 23, 2017, 04:22:41 PM »
Just to update on this...

I couldn't get enough space under the car to do this myself so ended up paying a garage to do it. On the way home the regeneration kicked in and by the time I was home my DPF load and soot values were in the 20s (previously in the 80s). When it was regenerating I could hear a quiet buzz at idle, which I took to be the 4Hz pulsing of the pump into the vaporizer. I kept the old part and indeed it was sooted up and blocked.

Thanks all for your advice here. It was a certainly a job that could be DIY with proper access.

Offline mike wilson

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Re: DPF fuel vaporizer problems
« Reply #13 on: May 24, 2017, 08:35:58 AM »
What did you actually replace?

I've been to my local hoist place a few times now.  Signage and stuff but never open, so I assume it's dead.  Most of the neighbouring businesses are in the same condition....

Offline drjaking

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Re: DPF fuel vaporizer problems
« Reply #14 on: May 24, 2017, 02:57:22 PM »
What did you actually replace?

The vaporizer. It comes as a unit comprising a glow plug and some pipework. Apparently the glow plug can be replace and the whole unit refurbished which I would have attempted had I been doing it myself. but in the event I needed the car fixed and threw money at the problem! It's great to see the DPF soot values come right down - it means that even a 6 year old DPF is working fine. I drive a lot in town and I suspect the vaporiser is the weak link in the system, but far cheaper to replace than the DPF itself. Had I not replaced it, I imagine the DPF would have clogged in the end.

Offline mike wilson

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Re: DPF fuel vaporizer problems
« Reply #15 on: May 25, 2017, 09:19:07 AM »
Thanks.  I might keep an eye out for a dead one to see if refurbishment is a simple process.

Offline DougS

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Re: DPF fuel vaporizer problems
« Reply #16 on: January 15, 2019, 06:00:41 PM »
Good Evening, first post, hope OPs can help?

I have P269F Glow plug open circuit (2011 S-Max 2.0 163 Powershift)

BUT F6 (20A)which supplies the vapouriser glow plug (AND the metering pump???) repeatedly blows which brings on the Engine Malfunction message and the orange MIL on dash.

As Ford procedure, I have:
1. Checked the relay R1 - seems to work fine.

2. Checked the resistance of the glowplug  - 0.8 Ohms, within spec, therefore glowplug is neither shorted nor open circuit (the message only comes on when a regen is started, the fuse blows and so becomes an open circuit)

3. Removed the vapouriser and whilst it is a little sooty on the outside (80k miles, no problems before), the hole appears clear and there has been a trickle of diesel when I dropped it below the level of the pump

If I leave the glowplug disconnected, the same error code comes up (obviously, as it IS open circuit) BUT the fuse doesn't blow.

3. The only other thing I can think of is the pump which is supplied via a tee from the main fuel line, across the crossmember and then to the vapouriser, has a fault BECAUSE the glowplug will overheat if there isn't a sufficient supply of fuel (I don't know how this happens when the dribble is there, I can only assume that there isn't enough flow, so the glowplug overheats and then blows the fuse?)

Has anyone any knowledge of this pump and how to test it?
There is no room to measure resistance as connector is on the top so impossible to get at without disconnecting fuel lines which I'm reluctant to do as may get air in main fuel line
Anyone changed one as I would happily change either or both if necessary but would rather do it on some logical basis rather than  just change everything in sight to no effect.

DPF soot load is at 100% so getting a bit anxious...

TIA

 

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