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Discussion Starter #1
Just spent the best part of a day cleaning out the particulate filter on my 140k 05 plate 407 SW 2.0hdi using Zooanki's 307 guide as a basis (thanks!). What an epic! Ended up splitting the filter from the cat. under the car and couldn't disconnect the rear pressure sensor pipe which is now slightly loose in the fitting and the nut almost rounded off. The filter had a layer of black soot on the end which had virtually blocked it. After cleaning and reassembly and a couple of short journeys, the filter blocked warning symbol is coming on and the car is running lumpy. I suspect the first bit of advice will be, "Rip it out!", but other than start spending too much money, any suggestions about what might be going on?
 

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My friendly local workshop man reset the fault codes with his generic code reader before I took it home and started work on it. Car just died on my son half a mile down the road but can't tow it back 'cause it's an auto. I'm just off to try to limp it home. Friendly local man also gave me a litre of fuel additive and the kit to refill the reservoir on a sale or return basis. If the reservoir is empty, could this cause the filter to soot up this quickly?
 

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no fluid will mean the filter blocks quickly, resetting is not enough in this case. System needs to know fluid is present (assuming it is empty). Also system needs to think a new FAP is fitted and this is something generic readers will not do from my experience.
 

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i can plug in and check what is up if you can get to me this week, I charge a tenner to cover the cost of my gear but planet may give you the answer!
Whereabouts are you? Do you want to send me a PM to advise. Given recent developments, I might no make it even if you live in the next village!
 

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no fluid will mean the filter blocks quickly, resetting is not enough in this case. System needs to know fluid is present (assuming it is empty). Also system needs to think a new FAP is fitted and this is something generic readers will not do from my experience.
Looks like a fluid check and top up then. I've seen the photo instructions on the site, but where exactly is the reservoir located?
 

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the reservoir is located in front of the N/S rear wheel - you need to get under the car to get to it... EDIT: oops, see you have a 407...it might not be in the same place as the 307...sorry!

Just remove the DPF - money well spent in my opinion (am still in the process of removing it from my 307) and you've probably spent nearly the same anyway assuming you paid about £25 for the litre of fluid!?
 
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the reservoir is located in front of the N/S rear wheel - you need to get under the car to get to it... EDIT: oops, see you have a 407...it might not be in the same place as the 307...sorry!
Nope, you're spot on.... in just the same place on the 407 :thumb:
 

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Discussion Starter #10
the reservoir is located in front of the N/S rear wheel - you need to get under the car to get to it... EDIT: oops, see you have a 407...it might not be in the same place as the 307...sorry!

Just remove the DPF - money well spent in my opinion (am still in the process of removing it from my 307) and you've probably spent nearly the same anyway assuming you paid about £25 for the litre of fluid!?
Yep, found it and just topped up the reservoir, even tho' it was a third to half full. Still hunting on tickover and stalling at every opportunity. If I go down the replacement route, do I keep the cat. and replace the filter with a suitably shaped exhaust piece?
 

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Yep, found it and just topped up the reservoir, even tho' it was a third to half full. Still hunting on tickover and stalling at every opportunity. If I go down the replacement route, do I keep the cat. and replace the filter with a suitably shaped exhaust piece?
if the fault is the fluid,then in that case then my money is on a filler cap sensor-if that is not working then fluid will never be injected! lucky they are easy to replace though!
 

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if the fault is the fluid,then in that case then my money is on a filler cap sensor-if that is not working then fluid will never be injected! lucky they are easy to replace though!
Unluckily, I fear I may have blown the turbo driving back from a fuel stop. Big pop and smoke under the bonnet. Maybe I should have just "ripped it out" in the first place! Wasn't far from Friendly Mechanic's workshop so have left it there for diagnosis in the morning as got to get back to work tomorrow. I'll keep you posted.
 
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A brief Q on this:

is it basically - motorway/long distance travel = fine DPF

and - door to door = cloggy DPF

?
 
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Oh.. I see..

Mine is spot on. I will never find out if it ever goes dodgy, but 98k miles on clock, 3/4 full tank of additive. And I have a girlfriend 41 miles from my home so vrum vrum up ze motorvayyy!
 
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If turbo has gone, I can't see how that is linked to dodgy a dodgy dpf or fuel additive?
 

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Discussion Starter #17
If turbo has gone, I can't see how that is linked to dodgy a dodgy dpf or fuel additive?
I was concerned that the back pressure had damaged the turbo but turns out the bang and smoke was from the EGR valve failing. Mechanic tells me that a numbr of faults are showing up on his reader, including low fuel pressure. Valve being replaced later. I'm hoping that we'll get some indication of what's really going on.
 

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Discussion Starter #18
if the fault is the fluid,then in that case then my money is on a filler cap sensor-if that is not working then fluid will never be injected! lucky they are easy to replace though!
Would this show up as a fault on the mechanic's code reader?
 

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Discussion Starter #19
if the fault is the fluid,then in that case then my money is on a filler cap sensor-if that is not working then fluid will never be injected! lucky they are easy to replace though!
Zooankski gets the cigar! Dodgey fuel cap sensor turned out to be the cause. Pop and smoke actually caused by inercooler hose and forward exhaust pressure sensor pipe bursting due to back pressure. Now all replaced and after pouring a bottle of Forte Diesel Treatment in the tank and a rag up the M11 seems to be running sweet as...(for now!)
Thanks for all the advice folks!
 
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