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By (user no longer on site) OP
over a year ago
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We use this combo to go to parties in
AnyWay had problems with white smoke when hot caused by dpf regen
Tech plugged gismo in and forced a dpf regen and upplied update for problems communicating with ecm and to reduce oil dilution in dpf regen
Anyway gave it a good run 20 mins at 75 it's restricted to 75 btw
It still did a dpf regen and smoke was not as bad 40 mins later did another
Has new egr all pipes clean boost sensor clean
Before update showed code 0404 and 0403 when read pressing brake and throttle no emil
Now shows none and none on tech 2
Any ideas
Thanks in advance
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Dont buy a car with a dpf.I have a mini diesel and have had nothing but trouble with both dpf and erg valve.sorry cant give any other advise,even the guy who invented the dpf said he would never by a car with one. |
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By (user no longer on site) OP
over a year ago
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"Dont buy a car with a dpf.I have a mini diesel and have had nothing but trouble with both dpf and erg valve.sorry cant give any other advise,even the guy who invented the dpf said he would never by a car with one."
I worked that out £350 ago lol |
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By (user no longer on site)
over a year ago
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Its normally one of the sensors by the dpf, they get a spot of shit on the end which burns in and gives false readings. It maybe worth getting the live values read by someone who knows what to look for...which is likely not a Vauxhall garage as the ones near me seem to see a dpf fault and tell you it needs a dpf if it doesnt regenerate |
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By (user no longer on site) OP
over a year ago
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"Its normally one of the sensors by the dpf, they get a spot of shit on the end which burns in and gives false readings. It maybe worth getting the live values read by someone who knows what to look for...which is likely not a Vauxhall garage as the ones near me seem to see a dpf fault and tell you it needs a dpf if it doesnt regenerate"
I had a licenced Vauxhall specialist round today looked at the values seems pretty confident that it was the dpf
Just wondering why it regen twice in a hour
And more importantly am I going to a city tomorrow in rush hour and going to sit in a cloud of smoke again lol |
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By (user no longer on site) OP
over a year ago
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"Was going to buy an ex Royal mail Combo not sure now lol  "
Mine has done 139 k just had cam chain at Xmas
And now this dpf issue apart from that in 4 years just tires and bulbs |
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By (user no longer on site) OP
over a year ago
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"https://www.youtube.com/watch?v=MtI5sDzSAWM
this one went wrong
https://www.youtube.com/watch?v=Vl2XRNYHl5w
"
That's pretty much what it was doing on forced dpf regen |
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By (user no longer on site)
over a year ago
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Im no vauxhall engineer, but I just read your post in more detail, and spotted the white smoke bit.
The regeneration is normally activated by a certain pressure difference between pre and post dpf, showing it is clogged with black sooty crap and the regen blasts out a black smoke cloud.
You said white... That normally means water, are you sure you dont have a slight coolant leak i.e head gasket? This would go through and sit in the dpf and cause it to show a pressure difference and regenerate and likely show faults, giving a beast of a white cloud, normally with not much odour.
Could that be a possibility, it wouldnt need to be a big leak, maybe 1cm of coolant out the tank every 100-150 miles |
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Unfortunately, it is now illegal to bypass/delete/blank off any emissions device that was fitted to the car as standard at time of manufacture. So EGRs and DPFs are a way of life in the modern diesel. If you don't keep the EGR clean, and spend at least 20 mins at 3k rpm every week or so, then the DPF will clog up and no amount of forced re-gens will clear it - it's a new DPF job.
As someone stated above, could just be sensors, but more likely needs a new DPF too.
My MG ZT has the BMW M47R engine. Thankfully it was just pre-dpf (and also no swirl flaps to break and kill the engine). The EGR can be disabled by removing and blocking the vacuum hose that activates it, without giving a dash warning, and as it's hidden by the engine cover, is not likely to be detected at MOT.
I've recently tried adding 200ml of 2 stroke oil per 65L diesel. It definitely runs smoother/quieter and no smoke (not that it was smoky before, but almost none now). Some people report more power and better mpg, but can't say I've noticed any significant improvement on mpg, but possibly a bit more power. |
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By (user no longer on site) OP
over a year ago
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"Im no vauxhall engineer, but I just read your post in more detail, and spotted the white smoke bit.
The regeneration is normally activated by a certain pressure difference between pre and post dpf, showing it is clogged with black sooty crap and the regen blasts out a black smoke cloud.
You said white... That normally means water, are you sure you dont have a slight coolant leak i.e head gasket? This would go through and sit in the dpf and cause it to show a pressure difference and regenerate and likely show faults, giving a beast of a white cloud, normally with not much odour.
Could that be a possibility, it wouldnt need to be a big leak, maybe 1cm of coolant out the tank every 100-150 miles"
The smells definitely un burnt diesel apparently that's ok when forcing regen |
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By (user no longer on site)
over a year ago
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"mot fail now if you remove dpf now
https://www.gov.uk/government/news/new-rules-for-mot-to-test-for-diesel-particulate-filter"
It certainly is but many place will pass them. They don't advertise it obviously but it happens all the time. |
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By (user no longer on site)
over a year ago
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Have the DPF cored and leave the empty housing in its place. That part of the MOT is only a visual inspection anyway.
Repeated regens usually means the previous one was interrupted. In many cases this can only happen a few times before you need to visit a specialist to have one forced on their diagnostic computer. |
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By (user no longer on site)
over a year ago
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"Have the DPF cored and leave the empty housing in its place. That part of the MOT is only a visual inspection anyway.
Repeated regens usually means the previous one was interrupted. In many cases this can only happen a few times before you need to visit a specialist to have one forced on their diagnostic computer."
That's a good point just hollow it out so the inspection will pass 
Could an eagle eyed assessor pull it of the welds are visible for example ? |
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By (user no longer on site)
over a year ago
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If it has the outer casing and pressure sensor pipes in place I pass and advise.
THE most important overlooked point here is you MUST use the correct oil.
VX standard for dpf / low SAPS is called DEXOS 2 but C3 is acceptable. This prevents so much of the sooting in the first place.
Find the standard required for your car and stick to it! |
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