New Car parts aren't always good Car parts!
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- Опубліковано 23 січ 2020
- In this video we diagnose a Dpf system and learn at New isn"t always good!
Enjoy the video!
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The material on the inside of the DPF looks like weld slag.
DiagnoseDan
Thanks for mentioning that cause might have been a leaky pipe.
DPF’s usually don’t clog up by them selves.
@@Conservator. Yes That's a good tip, and from Russians I learned, if You have Vape [electronic cigarette who makes big cloud from burning Vaseline] show it exhaust and blow smoke inside pipe and white steam will come out true smallest holes, and the same for intake system. that steam finds really smallest pass true holes and is so good visible.
Hello Dan and many thanks for thoses explanations, will you expect to open the refurbished DPF to see what's causing the block ?
i' got the same issue on a 50 000km (30000 miles) mazda cx-5, after changing three pressure sensors without results, Mazda mechanics are now changing the dpf itself, but i'm not sure if there is an issue around the DPF (rich injection, oil leak thru turbo...) symptoms are : dpf light on, high consumption, low power at high revs, very short regeneration intervals (25km).
Here is a video of my car:
ua-cam.com/video/mr14zbqJkBQ/v-deo.html
can you please take the tim to give me an advice that will be very helpful ? the car is at the workshop since 7 months
Regards
Totoribus dm
Usually a clogged up DPF is a symptom of something else. It could be a faulty mass airflow sensor or a leak anywhere in the air intake, turbo, intercooler intake manifold. Leaky fuel injectors, bad EGR valve, etc etc.
If so, just replacing the DPF will only temporarily fix the problem and soon enough the check engine light will be on again.
It is quite possible that by now you have two problems: a clogged up DPF and the other unknown problem that is the root cause of it all.
Did your garage check the whole engine or did they just focus on the sensors and the DPF?
best auto diagnostic channel on UA-cam. dan has such a gift and talent to explain complex problems of car into simple easy to understand concepts. we love you dan, you're our superhero!
Did you see the blooper? I'm not a superhero😂
"But since we're not guessing but diagnosing"
And that's why I love this channel -- and I'm not in the automotive industry. This is such a basic skill that is lacking in so many industries these days.
Forkless what gives with the flag ?
@@howie119 Some military bransches put them upside down. I don't remember the reason but i thinbk the folklore I heard was it has to do with idedentication and in the specific instance the flag will face you the right way if it' upsode down.
Displaying a U.S. flag upside down is "a signal of dire distress in instances of extreme danger to life or property"; It can also be viewed as an act of desecration. It has been used by extension to make a statement about distress in civic, political, or other areas.
@@RobertCiampa9112 Correct and perfectly in accordance with U.S. flag code. Ironically enough people who seem to complain about acts of desecration or unpatriotic behavior are often the same people that use said flag design as a shirt, bikini or greasy t-shirt.
@@howie119 What flag? Ae you talking about my avatar? Just out of curiosity, are there rules for those?
I’ll say this again at the cost of repetition - What Dan does is not basic knowledge. This is really deep rooted knowledge of a lot of things. The Brittanica of car diagnostics. Fantastic Dan! I wish you were my teacher.
Thank you for the kind words 😀
That Saab APC gauge is very cool. Love these old special tools
Yes i love it, i have also got digital gauges but i like this one
When I saw Dan bring the gauge I though: looks like the Saab gauge from 1982 when the Apc was introduced, and it sure was!
Seen and used that gauge many times as my father worked in the local Saab workshop his entire life from 1964, until the bitter end with the bankrupsy of the workshop that fallowed the Saab bankrupsy.
Very good and explaining video Dan!
You are the best on UA-cam because you explain what you are doing all the time and you are very easy to understand when you explain different things.
Keep up the good work!
I have never seen a person who understands cars like you Sir!
Thanks Sonny
🤣🤣🤣That blooper had me laughing but the info on the repair with the tools you showcased informative. When it come to auto repairs DiagnoseDan is the man!
Thank you!😀
Hi dan, I worked as a builder in Germany close to the Dutch border and got to be friendly with a lot of Dutch guys who looked after us Irish very well and we went into holland every chance we got because of the help and of course the lovely Dutch beer the guys gave us, I will never forget the help we were given and seeing your channel just shows the Dutch help is still alive, I've been back to holland a few times and when this crisis is over I'm certainly going back again and if possible I'd love to drop in and buy you a beer or if you're driving a coffee but none of those funny cakes my mate used to buy and munch, love your channel dan and as a complete idiot when it comes to cars you make it so simple to diagnose
That camera had great definition and it's ability to swivel was excellent too.
Great thorough diagnostic work on that faulty component.
When other workshops are sending you work it's because they recognise and respect your capabilities and professionalism.
Another great video that has it all - diagnosis, repair, confirmation and most importantly, indication as to why the DPF got clogged in the first place!
Shows you how ingoring small problems can lead to huge costs.
Never ignore the details😉
This would also lead to abnormally high fuel consumption. Not such a small problem.
We love DiagnoseDan ❤️. Love from Nigeria
Thanks👍
piezo
turbulence
I am an old construction electrician. I spent most of my career installing energy management systems. In temperature control an air management controller had to calculate the volume of air moving through it to properly do its job. The differential pressure sensor pickup ring came as an assembly from the manufacturer. Someone had to attach the hi tube and low tube to the differential pressure sensor at the controller. These rarely failed. Sometimes we had to install the tubes install the field. We had to be in a straight section of duct to accurately measure air flow. Any turbulence would make the system useless. If the pressure/electric sensor is not reading total pressure and static pressure it won't read correctly. That black debris is probably buggering things up. I am always impressed by you sharp automotive guys.
Salutations from a fellow trouble shooter.
Jesus... It has been a while since I did not find a good professional. Here it is, analytical approach and logical rationale while approaching problems, sceptical about quick judgements and goes deep on the details combined with experience. They are rare thesr days... This is great content.
Really really great job and approach to problems. Congrats.
Hey Danny.
Again a very interesting video. I am an automotive engineering student from Belgium and always learn a lot from your educational videos!
That's awsome! Thanks for watching
Time spent watching your content is never a waste, great work and heaps of useful info. Thank you :)
Thanks😀
I'm not even a mechanic and I love Dan's videos. Brilliant work. Wish you were in Wales 😂😂
Just found this channel and I love the content very informational thank you
Welcome😀
Dan.... you need to fly to USA and teach all mechanics about emissions systems because here nobody understand how they works...
Thank you for another great video!!!! 🙏🙏🙏
I'm thinking about coming to the USA this year😉
He is only one guy, only human. He can do this much. He can't fix the whole educational system😨😱😷.Sorry if I offended anyone with this joke. The most talented guys I have seen with skills are in the tuning industry. The you tube mechanics from the USA are for entertainment purposes only in 90% of what I have seen. Don't even want to touch a Japanese or European problem car. Those that do call in some silent bob who does know stuff. Fixes the problem in a time laps & by dumb trail & error swapping everything out part by part. telling why buying a second car was a good deal. Still sometimes fun to watch. For learning stick with Dan
DiagnoseDan super Saturday Dan?
Hungary also needs a few good mechanics. I couldn't get my old car to idle properly in 3 years. That means it's been to about 10 mechanics. It always idled low and stalled with the AC on. That's why I learned to heel and toe. To be able to use the AC.
Simple 1.6 NA petrol. Good compression, low leakdown, good ignition (new plugs, leads and coil), new fuel pump, new fuel pressure regulator, smoke tested the intake, no leaks. MAP sensor checked and good, later replaced (the car doesn't have a MAF), went through 3 idle air control valves (the one that was on the car, a new aftermarket one and one from a known good car), never fixed.
All I ever found was that the ECU thought the mixture was slightly lean. 10-12% long term fuel trim with 0 +-2% short term. Never checked the injectors. Didn't know how. Didn't have the equipment. Would have been my next guess but I sold the car. Owned it from new in 2002 to 320k km in 2019.
Unfortunately most of these tests were done because I asked for them specifically not because the mechanics had any idea where to even begin to look.
Any professional who doesn’t understand emissions systems in modern vehicles is likely either a lube guy or tire guy. They are actually quite simple systems, requiring only some patience and the correct tools.
2:54 ~200C* (392F*) is the start temperature in some DPF temp sensors as the tarket temp for soot burn is at ~600c* (1112F*) That is if your car dont have system that lowers the burning temp of the soot. So never ever park your car that Has DPF in high grass!!!!! ...or you may have just started a fire that may cost more then your car.
3:43 It can also take messure from front of the cat (folowed by DPF) and the secon mesure point can be just atmosphere. That means the hole Exhaust backpressure is taken in your calculation.
And so the fault can be in other part of the exhaust system.
+ if you cant see too mutch pressure in park then take it to safe plase to takerun at it. In secend gear from 1000rpm WOT to close to the red line. Then stop and take a look at the beak pressure.
No turbo 4-cylinder engine max is usually ~150mbar with turbo 4-cylinder engine max is usually ~250mbar What i have seen car bean happy. No V-engines yet as these are more on Diesel exept they are comeing for petrol ass well here soon and alloso i live in Finland where thers no too much V-engines anyway.
If you have Vacuum/pressure hand pump with gauge you can test its ok with your vacuum/pressure tester and when you know the ballpark in your hand pump then test the cars pressure tester and look at your data on scantool. Dont but more then 500mbar (0,5bar) to it as it can couse damage to the DPF sensor...
Allso make sure to hook the lines back in rigth order! ...Some customers comes to us that have car that has new DPF and now its diffrent code then before. Well ofcorse as it cant see the backpressure if its backwards...
I mostly wash them(water + soot removal product and time lots of time to dry folowed by full regenaration job) as they are mechanical filters anyway that means that the filter holes are so tiny that soot cant come out and there is no cemical reaction needed like in CATs that do the cleaning job and kill them self in process.
18:05 As DPF gets hot, those temp sensors gets stock (rememper what temp sensor is and how its made) as you turn them off you 90% of time Break them or shorthen the life time.
So DO NOT do wash job with maschine that hooks in them in the car(if you dont want to install new sensor allso) allways take the DPF out of the exhaust system and wash it from back to front so shoot gomes out the way it come in from...
Allso Know your DPF system example Ford use on some engine models a system that sprays extra fuel in exhaust pipe if that glow plug/ fuelnosel is broken then it will come back with full of sooth as it cant start the regenaration and no mostlikely there is no other code for some grat reason unknown...
These are just my points and NO all isnt made the same so take it with grain of solt!
Nice video man you earned a sub!
Have a great week end! Cheers Timppa
Excellent and very interesting diagnosis.
Thanks for sharing and best regards from the UK.
Thank you very much!😀
Forgot to say again love your diagnose.
Appreciate you from Denver, CO.
Hey dan,
some thoughts on the failed part:
Looks like the washcoat is very inconsistent. That would be the silvery stuff on the surface. You never, ever, want to see something like this on the DPF. It is also visible on the rear of the filter; there it isn't as visible, as there is no soot stuck to it.
The first part of the filter is actually just a catalyst. You can clearly see that on the first part, all the cells are open, whereas in the second one, only every other one is. The reason is that for a DPF every channel is blocked at one side; the filtration is actualy happening in th walls between the cells. This is also the reason why DPFs have quite high back pressures.
For this reason; a too heavily coated DPF will experience too high back pressure, especially when the part is new. The coating blocks too many of the pores inside the monolith. During the first regenerations, this coating is quickly deteriorating, which leads to reduced back pressure.
Back pressure of a DPF is extremely sensitive to soot loading. Your pressure readings may actually be sort-of OK for a heavily loaded DPF. Ideally, you'd want to do a regeneration (if possible) before conducting backpressure testing. Many ECUs will adapt their backpressure model according to an aging factor; if the ECU is not told about a new filter, it may trigger a false diagnose.
Also, high back pressure is usually cause by one of two things: Ash loading due to age (ash is a result of oil consumption, and cannot be burnt during DPF regeneration), or due to excessive smoke of the engine. A Dirty MAF can easily causen a overloaded DPF. Considering the almost 200.000 km on this vehicle, both are possible for the original filter (the one you never got to see).
Since the front of the filter was quite clean, I think it is safe to assume that the replacement filter did not run for very long. Within 50 or so kilometers, you'd expect the front of the filter to be black, so excessive soot load was likely not the cause; and replacing the filter AGAIN was likely the correct call.
If the filter was damaged (cracks, blown out plugs), the differential pressure would be too low, and this shouldn't trigger a limp-home mode.
Limp home mode will also increase the back pressure, as it will be run without EGR, and you will have significantly increased air mass flow vs. normal operation. Can be up to 50% more, depending on operationg point. So again, for the backpressure test, the limp home mode should've been cleared. 200 hPa at no load 2500 RPM is still too much, though.
Thank you.
I'm sure aftermarket parts have been getting worse in recent years. Great work I really enjoyed this
Thanks for watching 😀
awesome ! so many things I learn from you everytime I watch your videos
thanx
Diagnose Dan,you kicked ass again!!!!!!!
Diagnosedan I've been telling many people for quite some time now that new does not always equate to good or better. Always research the company and distributor of said parts. Thanx dan!
Your right!
That camera was pure VooDoo ! Always love your stuff Danno,,,
Yes its a great camera
Good to see you back for the new year. Great job.
Better late than never😀
Again.... a cool and professional way of diagnosing critical issues...great job sir Dan!
Rhanks,👍😀
Great video as always Dan , the
Metal inside the DPF is most likely from the diesel oxidation catalyst in front of the DPF monolith .
Thanks for sharing your thoughts!😀
Really good and informative video! More diesel videos for us diesel-driving europeans please
When i get something interesting i'll make a video about it😉
Great video Dan, you are one of the best instructors i know.
Wow! That's awsome 😀
YOUR BACK Nice to see you Dan and Happy New Year to you! Thank You
Happy new Year!
I was trying to work out how the DPF could be affected by new carpets!
Me to,, car parts.
A G me, too 😂
Well we did have the door that prevents the car from starting, and Toyota had the carpets to prevent the car from stopping...
Yep, I read the title as carpets too. Doh!😬
In the Netherlands (like in Germany) we’re used to concatenate words like car parts. 😂
Thanks Dan. I have been waiting for a new video for a long time. Great to see you back. I was wondering if you were still here as I got no reply to any of my last comments under your older videos. I started watching every one of your videos from the beginning and have watched some of them more than 3 times. I can't thank you enough for sharing your knowledge with us "the mechanics KEEN to learn" Thank you
I'm getting alot of comments and that's great but i can't keep up with them all. So i focus on answering the comments of the new Video😀
@@Diagnosedan I totally understand Danny, It is an honour. Please keep up the great work and keep doing what you are doing. I have to be honest, there are very few car channels that can compete with your knowledge and I very much like your editing and presentation style. You are a legend mate. Thank you for your time
Nice to see another vid, Dan! Hope you and yours had a great holiday season.
Thanks for another useful video. Always look forward to them. Never disappointed :)
My pleasure 😀
I am gonna watch all of your videos Dan!
So much to learn here
Was that first one a Dorman Product? 🤣🤣. Great job as always pal.
love this video from australia
We don't have Dorman over here Corey but the this part was about the same quality
Hi Dan! Nice video as usual! Very imformotive and detailed.... Thank you!
My pleasure
Dan is no "parts changer" . A real mechanic. What all technicians should aspire to be.
Thanks Shawn
Dan, you should of visually inspected the second replacement dpf and compared it to the internals to the first (bad new one) it might give you some clues as to why the pressures were so high.
Was kinda hoping he would have.
Dude, he knows how working DPF looks like xD
Prolly poor quality manufacturing in the "bad new one".
Your right, maybe i should have. But it looks like the clean side in the video
That first filter must have been a BWD part, Broken When Delivered 😂
Lol!😀
No it was a dorman instead
I would guess a Dorman
With 30 years in the auto parts business I can tell you Dorman is in fact pure crap. Sadly, so are some of the parts on cars from the factory these days. BMW window regulator assemblies anyone?
Home diagnosis and repairs will soon be impossible without very expensive tools. I hope there are honest technicians like Dan out there for all of us to use.
I'm pretty surs most technicians are normal honest people 😀
Nice work Dan! A great video tutorial on DPF diagnostics.
My pleasure Sir👍😀
THERMOSTATS---- I'VE FOUND THAT AT LEAST 30% OF THEM ARE BAD WHEN NEW so test every one before install.
Amazing!
I think aftermarket ABS wheel bearings are the worst. It's really hit or miss with them. GM is known for bad ones all the time. What's worst is it's a sealed unit usually which is very expensive
I only fit genuine thermostats now, had so many duff ones.
How do you test it before fitting?
Raj Shah pan of hot water and a thermocouple. Make sure it doesn't open, even slightly, before the point marked on it,
Where’d you get those double hinged ratchet wrenches?
Those look awesome!
Facom has them and even Lidl online. I'm not too keen on the hinged ones because you have less control.
That compound gauge is a really nice piece of kit Dan. Great case study thank you for sharing.
I love it!
Great work Dan love the Autel
Me too😀
You're the best
Thank you very much
Excellent Dan!
Love the blooper😂😂
🙈🙈
Dan you're the man. Thanks for sharing the knowledge.
My pleasure!
Awesome diagnosis big thumbs up 👍
The first " new" dpf was made with wrong specification or it's just cheap recon, cleaned with garden hose and simply blocked.
🤪
I dont change DPF, i remove clean it empty ash put it back, change engine oil to C3 5w30 dpf specific oil problem solved and also leave car running with AC on when i stop for 5 to 10 mins between places.passive regen no blockec DPF.🤣 never use additifs that enzyme speed regen it blocks it faster with soot n ashes.i also lock the car from outside with engine running to be safe.all 4 doors are mirror tint.car Alfa 159 2.4 jtdm
5W30dpf the same that we use😉
Impressed, Very good comparison, old , aftermarket, and OEM. love the tools.
The third DPF was aftermarket too. So it was:
Old (Original OEM)
Aftermarket cheap & cheerful
Aftermarket high(er) quality.
Thanks!😀
Dan bring to a simplest level to teach others thanks to you sir..
13:23 a new one looks like enamel free ceramic, kind of light tan color. This is a piece of s#$t. It's amazing what they are trying to get away here. A frickin' expensive part too!
warranty return refund of full purchase price...!
🙈
You need to be an instructor. You make it very easy to understand on any of your videos. You talk on a tech level. Had lots of new parts defective in my time.
Experience makes you avoid certain brands 😉
Nice job my friend. I like how you use fundamentals to work smarter not harder. It’s all about making sense. Thanks for sharing
Never forget the fundementals! Thanks for watching 😀
Great educational video as always. Thanks Dan.
Thanks Pawel!👍😀
I was keenly waiting for your next video and was not disappointed, having a diesel car with DPF myself! Very well-explained, learnt a lot today, thank you!
Awsome, glad you like the video!😀
Thank You Dan. Great Video, You are a great teacher. I really enjoy watching your Videos. I would love to see some more. Best Regards.
Nice comment! Thanks👍
Once again very professional and informative video, Thank you very much Sir.
Dan you're a great Tech😎, really learn a lot from you, keep up this great work👍
Thanks😀
Hi Dan. Nice to have you back. I am no mechanic but enjoy watching every video of yours. Keep up the good work.
Thank you Sir 😀
Wow. Watching your video and you telling about the details on how it works in detail is so interesting. Never thought that there were so much research, innovation and controls implemented.
Even simple things like the exhaust is high tech rocket science. 🤓
I love the final comment regarding the probable cause why it failed in the first place. Leaking hose. 👍 Must maintain all parts to avoid expensive parts failing.
Thanks for the comment and for watching my video's Andreas😀
Great job, Dan. Love the blooper!
I was in shock 🙈
A joy to watch your videos.Cheers!
Glad you like it Stefan
Great video , just so easily explained and allowing us to understand.. Great stuff keep it up!
My pleasure 😀
Great video and explanation! Man that blooper was awesome. The look on your face 🤣
I was scared to death🙈😂
thanks Dan, well explained video and for sharing your knowledge.
My pleasure!👍
Another great video Dan , that blooper was priceless ; )
I like the fact that you had an Old-school manometer to confirm the readings from the engine management system and that you didn't rule out a professional clean of the DPF as opposed to always going for a new one. The multitude of problems that lead to blocked DPF is mind boggling, from a simple out of Calibration exhaust gas temperature sensor, to the obvious turbo oil seals . One of the most overlooked causes is EGR cooler leaks and the owner keeps topping up the coolant without getting it repaired in time.
Keep up the good work 👍
Thanks for watching!😀
Dan you’re the Man! Another great fix
Thanks!
As always a very good educational video! Thanks a million!
My pleasure Sir 👍😀
Thanks Dan, great info... 👍🏾
My pleasure 😀
I am a beginner and I learn a lot of things here, thanks Mr Dan
👍😀
Great video Dan! Best blooper yet!! 🤣🤣
😂😂🙈🙈
No more guessing with Diagnosing Dan, incredible work best l seen
Very good Dan.
Another great video. Thank you. It will be great to have this inspection camera inside this new dpf filter to see the difference.
Yes i should have done that
Great channel Dan.... it would be nice to have seen an inspection with the camera probe on the second new DPF to compare against the too restrictive first one. Keep up the good work!
Another excellent video Dan. When a new part is bad, it can really throw off your diagnose & steer you in the wrong direction. I'm talking from experience here. Great lesson as always
Thanks Andy!
Well done Master!!
Thanks!
Hello Dan, I’m a big fan of your videos! Keep up the great work!
Many factors play a big role in determining B.P (back pressure). My guess for high B.P is poor substrate porosity (exh. gas travels through channel walls) + bonded substrate sections (OEM substrates are a singular brick)
Good morning from Toronto Can. Dr. Dan & thank you kindly!
My pleasure!😀
Thank you for great educational videos!!
My pleasure 😀
Well done Dan another mystery solved and a brilliant relevant video added
Thanks for watching!😀
Great video Dan as always!!!Cheers!
Thanks for you comment!😀
Definitely agree. Get old DPF cleaned if possible. Been caught out with dodgey aftermarket DPF myself & the company seemed so plausible that supplied it!
Not every reseller knows what they are selling!
Well done! Thanks for this video...
My pleasure 😀
Once again another great video from you Dan,.
Thank you😀
great job Dan!!!!
Thanks!
Dan is so good at what he does he makes me want to learn how to diagnose vehicles.
great work Dan. cheers NZ
This is absolutely Awesome video by DiagnoseDan
Thanks!😀
I am not an automotive guy,but I enjoy your channel for the thoroughness you display.I checked the links you posted and find it interesting that the inspection camera cost close to as much as the scan tool!
Yes the camera isnt cheap but its a very professional tool. I understand its not for everybody.
You're the best teacher thanks Dan 👌
My pleasure 😀
Great Video Dan!
Thanks😀
Thanks Dan
Excellent explanation
Thanks!😀