Yet another DPF issue.

[Aquiesce]

Can anyone point me in the right direction here,

SO story so far, had a clogged up DPF that obviously wasnt regening, so initially i took the DPF off and manually cleaned it soaked in DPF Cleaner and rotated for 4 days, then washed out.
After this I tested the Vaporizer and got crap resistance readings and eventually when putting 12v to it on the bench I noticed the Glow plug wasnt heating. I had another good genuine Vapouriser intact genuine ford so I tested that one as working, cleaned it all up so its dead clear and fitted that. Now im not well up at all on all these sensors and what I should be looking for but I know something is amiss when i look at the live data
which Ill include a picture of. I also replaced the Pressure differential sensor with a conformed working Genuine Ford Unit as I know these can go bad and it was cheap.
SO my question is what should I now be testing EGT sensors cracked hoses etc or what?

Originally I had all the stored faults of soot accumulation at maximum level etc, since doing all the work ive done I have a couple of glow plug issues that have always been about and now van starts fine but then after half a mile I get engine malfunction on dash and when i rescan i get P2002 - Particulate Filter Efficiency Below Threshold (Bank1)

Intermittent at time of response

Its also saying a static regen is not recommended at this time,that EGT surely cant be correct??

Thanks guys
Paul

[metalworker0]

says soot 0 percent

that below threshold can also mean cracked DPF

in other words system looking for signs of tampering .. measuring before and after dpf pressures and they don't compute with normal .. no or very little back pressure (kpa 0.1)etc could mean its gutted or cracked.

also there is a lot you are not showing in the capture .. which is needed to make a diagnoses

engine temperature , revs .. exhaust gas temperature readings - regen is activated when the conditions are right for it .

All the best.mark

[Aquiesce]

Hi mark ithanks for replying,

I cant absolutely confirm its not cracked i suppose but visually everything looked very good in my hands yesterday. As for being gutted its defintely not been gutted, its the original dpf from factory untouched.
How do i go about measuring these values you mention in forscan then please. Also ill get a better picture of all the things you mention ill add them to the chart
Thanks

[metalworker0]

sorry it does have exhaust gas temperature its in Fahrenheit

you need to load pids that are relevent

your 1832 Fahrenheit is exactly 1000 c, which is far too high - according to google

For a diesel particulate filter (DPF) to undergo regeneration, exhaust temperatures must be high enough to oxidize and burn off built-up soot.Active Regeneration: Requires exhaust gas temperatures of 550°C to 650°C. The engine control unit (ECU) actively injects extra fuel to artificially heat the system.Passive Regeneration: Occurs automatically during prolonged, high-load highway driving with exhaust temperatures of 300°C to 400°C.With a Catalyst/Additive: Chemical additives (fuel-borne catalysts) lower the required combustion temperature to between 250°C and 450°C

maybe exhaust gas temperature probe at fault .. causing this ... or your dpf would be glowing red to yellow very very hot!

chart temperature how much steel glows here

https://www.sme-group.com/blog/steel-co ... mperatures


BTW .. and ALDi this week .. [point and squirt gun temperature device £6


all the best.mark

[metalworker0]

And in that capture .. you are not telling us what is going on .. engine temp .. if its actually regenerating during the capture .. engine revs .. we are blind to what's going on, without this info from you or the capture from forscan ..

all the best.mark

[dumper]

Looking at O’Reilly autos on YouTube when he cleans a Dpf he has to go into the maintenance menu and tell the ecu that it’s had a new Dpf fitted or on some vehicles reset the values another check he does if the tailpipe is back with soot then the Dpf is toast

[Aquiesce]

Hi thanks mark, yes Im aware of how it all functions ive done a lot of reading cheers, i was reading that the 0% cac occur when differential sensor is faulty has no power or cracked hoses so ill look into that, the EGT sensor now seems to be saying -40 weirdly Also the Aldi thing do you mean a temprature reading infrared gun thingy? if so ill grab one as thats a good price cheers

Ive made a better video with more PID on

https://photos.app.goo.gl/TNFcquy7kji7w7qb7

[metalworker0]

no video .. still being processed by google

you still have not said what the first capture circumstances were .. like was a regen taking place?

BTW .. minus 40 is the code for --- not working

all the best.mark

[Aquiesce]

Haha code for not working that could be an issue then i guess

As for the first capture not sure what you mean, the fist time all this happened I think the DPF had been trying to regen but couldnt as it had a knackered vaporiser glow plug so it just sooted up and blocked

[metalworker0]

The video is there now .. to be honest on my small monitor , i'm having trouble seeing it.
i can see that the EGR is working perfectly.
i can see a pid i think called "low oil" .. going from yes to no to yes .. what's that about? if its pressure you have more problems or a sensor fault.

all the best.mark

[Aquiesce]

Hi mark its actually low oil level going off when i revved up, topped it upp to correct level and is now fine. as for the video it was the same for me its heavily compressed and hard to make out, but if you leave it playing a while the quality increases must be a google thing where they compress it im not sure. Alsi if you click on thge video it will enlarge
thanks

[metalworker0]

i was squinting at it for more than 10 mins trying to make it out .. the only improvement came when i pressed slideshow ... made it bigger, which helped a bit , but not clearer.

EGR .. not sure about the commanded 20 percent and it's real time reaction is to go to 0 percent .. but i say that's an advantage - a gain - not sure if that would bring up a fault code.

BTW if someone could put a video up like yours with everything working perfectly it would help me out a lot .. as i could then say to people "this is how it should be"... especially for EGR's and turbo vane actuators, save lots of long replies and going back and forth.

all the best.mark