More DPF info

[120D4D Avid PP Poster! Find all posts View Profile Close 120D4D]

Many a vehicle has burn many an acre of farm land with hot exhausts. I know of one guy the burnt hundreds of acres with his petrol ute.

Exhaust heat is more than hot enough to burn spinifex, the danger of a DPF equipped vehicle is the same as any other, hence the practice of regularly checking underneath and being aware of where you stop/park the vehicle.

Just stumbled upon this old story of a 120 Prado starting a spinifex fire. Certainly no DPF at fault here...

http://www.carsguide.com.au/car-news...ex-grass-24518

[Bushbasher Out of control poster! Find all posts View Profile Close Bushbasher]

The stock front bash plate is a great grass catcher. All the more reason to get rid of it and buy something better.

[Lski Member Find all posts View Profile Close Lski]

We drove on the freeway for maybe 15-20mins and the dpf had only gone down to 84% so the tech suggested doing a manual burn. All that we did was sit stationary for about 10mins with the engine revs at 2000rpm. After this period the DPF was down to 6%. I have now driven the car up the freeway and on a few other slower roads and so far it looks like i've improved my consumption by close to 1l/100km. I will keep a close eye on the usage now just to see if it stays this way for some time.

Doug,
When he did the manual burn, was the prado completing a standard burn at the time (ie. idling at the 900rpm) before he rev'd it up to 2000rpm? Do you know if it needs to be completing a standard burn at the time of doing the manual burn or can it be done at anytime?

Cheers
Luke.

[JohnC80 Junior Member Find all posts View Profile Close JohnC80]

I had a call from Toyota aus and also the dealership. Turns out that dealers can check current % of dpf but nothing else. Not sure why they never checked mine when asked.

What I found most interesting is that the dealers head mechanic said that even with 40 000km on my car it may not have done a burn yet.

And regarding revs at idle, mine always idles at 900rpm. Diesel, auto.

[cuda Advanced Member Find all posts View Profile Close cuda]

Doug,
When he did the manual burn, was the prado completing a standard burn at the time (ie. idling at the 900rpm) before he rev'd it up to 2000rpm? Do you know if it needs to be completing a standard burn at the time of doing the manual burn or can it be done at anytime?

Cheers
Luke.

Yes the car was doing a burn at the time we revved it too 2000rpm. Not sure if the manual burn scenario will work. I think it needs to be doing the diesel injection into the DPF for it to be affective. Since that 2000rpm burn I have had 2 burns so far, one was at 287km which lasted about 5-10 mins as I didn't catch it when it started and the other which occured at 260km only lasted 5mins and was timed. I have connected Torque Pro to my vehicle and notice that when the 5 min burn happened my DPF exit side was cooking at 640 to 660 deg but if I increased the throttle to 2000rpm that increased to 700+ deg. I suspect you get a better, faster burn if you increased the rpm during a burn. Note that the temp was not as high while moving and was better done stationary. I am yet to get my techstream fully functional on my car but will be monitoring DPF once its working and will update with my findings as to how long DPF takes etc based on RPM.

Regards
Doug

[yowie Advanced Member Find all posts View Profile Close yowie]

With my new 200 series (3 months old, 4,000 on the clock, not too many country runs lately) scrolling though the trip meter reading, there is a DPF reading. Mine has shown readings of 0,1 and 2, and I found that the readings are changing every few days.

Do the 2016 150's have this function on their trip meters?

I would assume that the DPFs (2 on the 200) are doing the burns automatically, to the point that I am not noticing anything different in engine revs. I have not yet had the DPF warning light flash on the dash (hopefully not ever)

[CamJam Senior Member Find all posts View Profile Close CamJam]

I had a call from Toyota aus and also the dealership. Turns out that dealers can check current % of dpf but nothing else. Not sure why they never checked mine when asked.

What I found most interesting is that the dealers head mechanic said that even with 40 000km on my car it may not have done a burn yet.

And regarding revs at idle, mine always idles at 900rpm. Diesel, auto.

Is your IDLE UP button depressed? That's where mine idles when it's been pressed in. Around 200 lower without it being depressed.

[cuda Advanced Member Find all posts View Profile Close cuda]

Well managed to get Techstream going and my DPF is at 62% full after 187km. Tried to reduce the percentage by running at 2000rpm for a few minutes but made no difference. This would either mean that the 5th injector needs to be operating for the filter to start clearing or it is only based on the calculation and not actual DPF pressure values.

[corza3 Lurker Find all posts View Profile Close corza3]

Well managed to get Techstream going and my DPF is at 62% full after 187km. Tried to reduce the percentage by running at 2000rpm for a few minutes but made no difference. This would either mean that the 5th injector needs to be operating for the filter to start clearing or it is only based on the calculation and not actual DPF pressure values.

How did you manage to get Techstream working? Mine works on everything except engine data, when I select engine data, I get a fatal error. Any tips?
I have a 2016 Kakadu.

[cuda Advanced Member Find all posts View Profile Close cuda]

How did you manage to get Techstream working? Mine works on everything except engine data, when I select engine data, I get a fatal error. Any tips?
I have a 2016 Kakadu.

I got my cable from OBD family and its v2.0.4. Followed the instructions they sent. Couldn't get it working on my own laptop with Windows 10 (64bit)but for some reason works on the wifes Windows 10(64bit) laptop. I still can't get the firmware tool to work but everything else is good.
Only difference is the wifes laptop is using an i5 processor and mines a dual core. I was getting errors when using mine when I tried to see data. Now that I know the software and the hardware are sound I will try and troubleshoot my own laptop. I suspect I have dodgy USB ports as the they have been broken by the kids more than once.

Let me know in a private message what you have done and tried and I'll see if I can help.

Thanks
Doug

[cuda Advanced Member Find all posts View Profile Close cuda]

Ok so I have driven about 40km. 70% freeway at 100km/h and the other at around 60km/h. The DPF has increased from 62 to 76% full in that period.

[JohnC80 Junior Member Find all posts View Profile Close JohnC80]

Thanks camjam. Tried it but it went to 1200rpm.

[cuda Advanced Member Find all posts View Profile Close cuda]

Thanks camjam. Tried it but it went to 1200rpm.

Maybe having the A/C on could push the revs up. It should idle around the 700 rpm mark. Auto goes to 900 rpm during the burn and manual goes to 1200 rpm.

[Phs Senior Member Find all posts View Profile Close Phs]

Any one know why the 200 and 70 series models get a manual burn button yet there is not one on the Prado ?

[cuda Advanced Member Find all posts View Profile Close cuda]

I have just completed a burn while Techstream was active. What I found is the following

1. The DPF filter temperature matches the normal exhaust output temperature until a burn it initiated by the ECU.
2. Sitting stationary and letting the engine idle via ECU control at 900rpm obtains a max temp of around 585 deg
3. Revving the engine to 2000rpm while stationary brings the DPF temp up to 697 deg.
4. Once the filter reaches 8% full the burn ceases and temperatures drop rapidly so any further revving does nothing to the DPF.
5. Driving while doing a burn gives a far lower temperature of around 525 deg.

Based on this info I would suggest a 2000RPM burn would be a good idea every 5 to 10,000km. This would ensure most particulate would be removed from the filter increasing the longevity of the filter. It took approximately 12mins to complete the burn from 100% to 6%. I tried to see if there was a difference in DPF differential pressures and catalyst differential pressures. I started with 100% full at Cat at 0.054 and ended at 0.036, and DPF started 3.05kpa and finished with 2.42kpa.