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Old 03-07-2012   #46
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Re: DPF removal!

Quote Originally Posted by Doofer View Post
the particulate gunk must eventually wash down into the soil.
particulates from combustion are airbourne and cannot be washed away, this makes it a potential hazard for anyone working on diesels exhausts/EGR circuits?
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Old 04-07-2012   #47
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Re: DPF removal!

Any particles can be carried by water. Exhaust particulates are fine enough to be carried by air too - that doesn't mean that water can't carry them.

I'd guess it's pretty static by the time it's accumulated within the engine, especially when stuck together with oily stuff. The risk is when it's projected into the air from an exhaust.
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Old 04-07-2012   #48
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Re: DPF removal!

Quote Originally Posted by Doofer View Post
Any particles can be carried by water. Exhaust particulates are fine enough to be carried by air too
yes thanks you put that much better (and clearer) than I did.
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Old 29-01-2015   #49
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Re: DPF removal!

Hello guys. I've recently bought Fiat Croma 1.9 mjet (2nd hand). I've contacted a person who is a former engeneer in the licensed FIAT representative for my country. He was kind enough to check the car with original software and informed me that the DPF is emptied ( i dont know if thats the right way to describe that the DPF is a simple empty pipe now ). The guy didnt inform me however if the car software is modded to turn the DPF off. I've read some materials about DPF and the way its working but I still have some questions and I will be very thankfull if you explain me the details.

What will happen if the DPF is emptied but its not disabled in the software ?
I've read about some ... post fuel injection (exactly before the exhaust valves close) - does the software removeal of DPF also remove the post fuel injection I am mentioning ? In other words can someone explain the details of the software removal of the DPF and how is it affecting the car.

Thanks in advance.
Best regards.
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Old 02-02-2015   #50
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Re: DPF removal!

If your car is the 8V 1.9MJet Croma then it will not have a DPF. To my knowledge only the 16V models had DPFs.

If the DPF is removed or emptied then the DPF pressure sensor will not have the right pressure values and is almost certain to throw a fault. The only way to avoid this is to:

1) have the ECU reprogrammed to remove the DPF function
2) simulate / fake the sensor reading

If the ECU has been *correctly* reporgrammed then the ECU will not wan't or have any need to do a regeneration because as far as it it concerned there is no DPF (like on the 8V croma which uses the same ECU)

If a fake/simulate has been deployed then anything could or could not happen. Best case would be the ECU never sees a reason to regenerate. Or if the fake signal is not ideal then the ECU will always wan't to regenerate and your fuel consumption will go through the roof

If you find/think your car is often regenerating (you will feel the heat coming out from under the car, hot/fishy smell, blazing hot exhaust gases) then you should keep an eye on your oil level to ensure you are not suffering from oil dilution and raised oil level.
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Old 02-02-2015   #51
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Re: DPF removal!

i ran mine empty for a while before getting ecu updated, no errors but as car was still trying to do regens it resulted in clouds of blue smoke coming out the back every day
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Old 03-02-2015   #52
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Re: DPF removal!

Quote Originally Posted by dave View Post
i ran mine empty for a while before getting ecu updated, no errors but as car was still trying to do regens it resulted in clouds of blue smoke coming out the back every day
Interesting Dave

I wonder. Did you remove the DPF innards after it failed to regenerate? In this case then the ECU may have had the regen flag set and thus be wanting to regen, and also seeing no change in back pressure it kept on trying to regenerate.

This begs the question as to if the DPF is gutted just after a normal regen then a regen will never happen again *AND* the ECU is happy with a constant non rising DPF pressure signal. If so then and ECU remap may not be required and thus no insurance implications

I've mentioned before somewhere that I wondered if my DPF is slow falling apart as I often see smoke on startup, typical non DPF diesel smell, and regen cycles seem to be further apart and shorter.

I only really look a DPF data every service/oil change so haven't really got accurate timeline DPF data (miles between regens/time to regen/regen temperature) to definitively conclude anything.
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Old 03-02-2015   #53
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Re: DPF removal!

the guy who mapped it said it still needs the sensor in place even with dpf delete
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Old 03-02-2015   #54
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Re: DPF removal!

im not in here too often but there was a guy in alfaforum who was making dongles to reset dpf and egr codes so could be mechanically blanked and cored.
he developed to be a cheap way around it
here was a review
http://www.alfaowner.com/Forum/alfa-...-000-mile.html
here is a link to(I think his) yahoo site
https://groups.yahoo.com/neo/groups/DieselDPF/info
based on 1.9 but may be able to mod code for others
here was original thread
http://www.alfaowner.com/Forum/alfa-...ick-fixes.html
hes no longer on alfaforum, so search if that yahoo site doesn't find him
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Old 04-02-2015   #55
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Re: DPF removal!

Quote Originally Posted by s130 View Post
If your car is the 8V 1.9MJet Croma then it will not have a DPF. To my knowledge only the 16V models had DPFs.
I'm fairly sure my 8v mjet has a DPF. Certainly when I had all my egr problems years ago the main dealer charged me plenty to clean it out and do forced regens. Mind you, they also charged me plenty for oil changes because the computer would say 95% just after the previous oil change......
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Old 04-02-2015   #56
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Re: DPF removal!

Well I also originally thought that the 8V Cromas had DPFs fitted as well. But I was later led to believe that as far as the UK was concerned the DPFs were only fitted to the 16V models as the early starter/development platform for Euro 5 requirements which Fiat were never intending to you the 8V engines for. Only the 16V were destined to be Euro 5 compliant. Meanwhile all Cromas 8V/16V,no DPF or DPF were all only homologated to meet Euro 4.

If you PM me your Corma Model Number and 8 digit chassis number I will be able to confirm if it has DPF. If it does then this will certainly clarify a lot of confusion.
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Old 08-02-2015   #57
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Re: DPF removal!

Quote Originally Posted by BrianMcL View Post
Mind you, they also charged me plenty for oil changes because the computer would say 95% just after the previous oil change......
You need to complain to the garage. The 95% "oil depletion" is only 5% used. I don't know if it was a bad translation but the oil quality figure runs backward to what you would expect, 100% "depleted" is new oil, 0% is old. Even if it was a while ago they are still responsible. I wonder if it was a genuine mistake or they were pulling a fast one.

B.T.W running a car on the road with a cored DPF is illegal. It is an offence under the Road vehicles (Construction and Use) Regulations (Regulation 61a(3))1
"to use a vehicle which has been modified in such a way that it no longer complies with the air pollutant emissions standards it was designed to
meet."
While the MOT is only visual inspection and may not pick it up, the offence still exists. If the MOT tester knows it's been deleted and gives you an MOT anyway they could loose their test approval. see https://www.gov.uk/government/news/n...iculate-filter.

Robert G8RPI.
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Old 08-02-2015   #58
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Re: DPF removal!

Quote Originally Posted by g8rpi View Post
B.T.W running a car on the road with a cored DPF is illegal. It is an offence under the Road vehicles (Construction and Use) Regulations (Regulation 61a(3))1
"to use a vehicle which has been modified in such a way that it no longer complies with the air pollutant emissions standards it was designed to
meet."
While the MOT is only visual inspection and may not pick it up, the offence still exists. If the MOT tester knows it's been deleted and gives you an MOT anyway they could loose their test approval. see https://www.gov.uk/government/news/n...iculate-filter.

Robert G8RPI.
The Croma was fully homolated, tested, sold and bought as a Euro IV Emissions Compliant Vehicle. It was NOT homolgated to Euro V which WOULD require a DPF. So the Croma complies with the Road Traffic with OR without the DPF filter.

I'm afraid we have the politicians messing with stuff without thinking.
We now have an MOT test system which is out of line with Road Traffic Act and EU/UK legal vehicle emmissions homologation status.

I contacted VOSA several time in the past re: this and each time told they will get the right person to contact me and nothing happens. I suspect nothing happens cos they know the system is stuffed and do'nt know what to say.
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Old 08-02-2015   #59
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Re: DPF removal!

Hi,
Understood that the 1.9 16V diesel Croma was homologated to Euro IV, but the C&U regs say "designed to meet". As the Croma engine was a "dry run" for Euro V, the DPF was designed into the system. In anycase if you change the emission control system you do in theory have to prove it meets the emisssion specifications i.e. a SVA or IVA inspection. This is not practical or cost effective. I'm not saying the law is "good" but just want people to know the implications. There is also the insurance paradox. If you don't tell your insurance company of the modification and they find out, you could be uninsured. If you do tell them, and they know about the law, they won't insure you anyway (but at least the driving while uninsured won't be such a surprise). I don't think there is doubt about the rule. I'm not a lawer, but am a professional engineer and interpret the applicability this type of legislation as part of my job.

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Old 29-03-2019   #60
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Re: DPF removal!

Quick update.
Since 2018 the UK MOT includes a check for deletion or tampering with emissions equipment so removing DPF is an MOT failure.
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