DPF and white smoke

[404pug Avid PP Poster! Find all posts View Profile Close 404pug]

Could be an interesting meeting! Get them to ring Toyota on the spot?

[djw Lurker Find all posts View Profile Close djw]

I got my letter from Mr Toyota today. It says to contact my preferred dealer 'without delay'...for a software update and a DPF check.
Plus (if I request it) enable 'DPF custom mode', which gives me some of what my Scangauge already monitors.
No DPF button offered tho'.

I'll do the paperwork and officially request a DPF button on the basis that I'll be driving very long remote tracks, and the nearest Toyota Dealer could be well over 1,000Km by a driveable route.

Hi RPP

I’m in the same boat and want to push for a manual button for the same reasons as you. I’d be keen to hear how you go getting one.

Cheers

David

[404pug Avid PP Poster! Find all posts View Profile Close 404pug]

Prado booked in for next Tuesday BUT no button. Service guy says they are not allowed to fit it without approval from Toyota. He has applied to T to get it done after the update on the basis of the remote areas the car goes into [and showed me on the computer].They do not stock the button because they are subject to approval AFTER the update and after some data is sent to them. More to come after Tuesday.

[vxowner18 Junior Member Find all posts View Profile Close vxowner18]

Prado booked in for next Tuesday BUT no button. Service guy says they are not allowed to fit it without approval from Toyota. He has applied to T to get it done after the update on the basis of the remote areas the car goes into [and showed me on the computer].They do not stock the button because they are subject to approval AFTER the update and after some data is sent to them. More to come after Tuesday.

I didn't receive any official letter from TOYOTA in regarding to DPF recall, neither was any obvious DPF issue there at time of the routine 12-month service point. I told my dealership that my prado took ages to finish a burn (20-40 mins and longer depending on driving condition), then service advisor put in my VIN number and came back to me, my prado was due for an ECU update, which was all about DPF burns (to burn hotter, quicker, and more often), I was wondering if I could get a manual burn button along with the ECU update, he told me they couldn't do it unless they could get permission from TOYOTA. I asked him to send my VIN and request of installing the button to TOYOTA, in about two weeks time, permission was 'Granted'. Don't know the story behind, but I've got a manual button installed under warranty.

[bing10 Junior Member Find all posts View Profile Close bing10]

my VX jan 2016 build with 36,000km was problem free till last week. 1week post last capped price service and a couple of days outside 3 yr warranty, commenced a regen that took 8 days and 700km. for over a week was like driving a 2 stroke lawn mower. The smoke from a standing stop was crazy. . A long high speed drive on motorway didnt stop the regen.
So on the Monday resolved to book in to get DPF fixed, just before I made the call i found the recall letter - what a weird coincidence.
Im booked in for next week. The next day, the regen finished.
Im wondering if I hold the record for the longest DPF regen on PP?
I'D also like a button.

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

My last capped service has been completed, the dealer at my request did the update after the service. The soot was 70% when I left the vehicle with them and 2% when I drove it away. Only a short drive home so no idea whether it increases at the same rate or still does the recalculation but I am monitoring and will post the results after the next regen.

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

my VX jan 2016 build with 36,000km was problem free till last week. 1week post last capped price service and a couple of days outside 3 yr warranty, commenced a regen that took 8 days and 700km. for over a week was like driving a 2 stroke lawn mower. The smoke from a standing stop was crazy. . A long high speed drive on motorway didnt stop the regen.
So on the Monday resolved to book in to get DPF fixed, just before I made the call i found the recall letter - what a weird coincidence.
Im booked in for next week. The next day, the regen finished.
Im wondering if I hold the record for the longest DPF regen on PP?
I'D also like a button.

Hi Bing10,
I have logged all my DPF burns (more or less) for 25,000Kms to date. I have found that DPF burns take anywhere from 70Kms to over 100Kms at highway speeds (100-110Kms/hr). But at low speeds 10-20Kms/hr it can take just 6-8Kms.

Less is more.
I surmise that at high speeds the regen process can barely keep ahead of the sooting up process.
There may be a speed at which the regen process can't make any headway!

[bing10 Junior Member Find all posts View Profile Close bing10]

RPP, I also concur with your regen stats. Your theory sounds correct , as I noticed the problem as i slowed coming back into Syd traffic following a weekend return trip syd- coffs Harbour.

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

Possibly has something to do with engine temperatures- Low speed stop start traffic is making your engine work harder than cruise control set on 110. Low speed driving also means less air flowing around the DPF so it should get hotter- part of the reason (along with poor shielding design) that Ford Rangers are starting fires in long grass)

[vxowner18 Junior Member Find all posts View Profile Close vxowner18]

Possibly has something to do with engine temperatures- Low speed stop start traffic is making your engine work harder than cruise control set on 110. Low speed driving also means less air flowing around the DPF so it should get hotter- part of the reason (along with poor shielding design) that Ford Rangers are starting fires in long grass)

Last weekend, I had the shortest burn off ever since new. The burn started when I stopped at the red lights before EASTLAND shopping centre, and the burn finished right before I found a parking spot. That was pure low speed driving around for 6-7mins, I could see from Torque the soot% dropping at 15-20% rate. Highway way regen in my case (after ECU update) normally takes 10-15 mins now.

If this is true, the slower speed, the faster burn off.

[Prone Member Find all posts View Profile Close Prone]

Hi Bing10,
I have logged all my DPF burns (more or less) for 25,000Kms to date. I have found that DPF burns take anywhere from 70Kms to over 100Kms at highway speeds (100-110Kms/hr). But at low speeds 10-20Kms/hr it can take just 6-8Kms.

Less is more.
I surmise that at high speeds the regen process can barely keep ahead of the sooting up process.
There may be a speed at which the regen process can't make any headway!

Hi RPP, vxowner18 and others

I think you are correct, high speed and high load seems to increase burn time.

I have a my18 update VX with DPF burn pushbutton. I monitor with a scangauge.

My last 6 burns were all around Hobart but included some engine stops and sustained speeds up to 100kph on the southern outlet. Distance between burns ranges from 270 to 320 km.
1. 24.5 km 2 stops
2. 27.3 km 2 stops
3. 14.0 km 0 stops
4. 35 0 km 2 stops
5. 20.0 km 0 stops
6. 18.6 km 1 stop to 0% rose to almost 690 Celsius near end.

DPF temps usually 540 to 650 during burn. Normally starts to burn at 50% and finishes at 3%.

When I stop in during a burn it takes some distance before temps, water and then dpf get hot enough to continue.

When towing a 1700kg campertrailer during last year's 13,000km trip it could take over 100km to finish a burn at 100kph. Also it seemed to be a regular 170km between burns. After a while I found that lowering speed during a burn would allow the DPF temp to rise and I assume finish the burn quicker. Sometimes I slowed to around 85kph if traffic conditions allowed.

Regarding the manual burn button, not sure it will do anything unless the dpf attention required lamp is on. I have tried pushing it occasionally but it does not seem to initiate a burn.

Cheers
Prone

[vxowner18 Junior Member Find all posts View Profile Close vxowner18]

Regarding the manual burn button, not sure it will do anything unless the dpf attention required lamp is on. I have tried pushing it occasionally but it does not seem to initiate a burn.

I've tried the same thing, pressing or holding that button for 3 sec does not do anything, it has to be used with DPF attention lamp on. I now still prefer using Torque to force a burn off, as I can do it on a solo basis.

Cheers!

[Prone Member Find all posts View Profile Close Prone]

So far with 17,000km on the clock the ecu controlled burns seem to cope with the soot accumulation and extra burns have not been required. The annoying thing about the longer more frequent burns at high speed and load is the extra 1 to 2 litre per 100km fuel consumption for the duration of the burn. Fuel consumption that was looking good until the burn stated suddenly takes a turn for the worse.

Cheers
Prone

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

Thanks Guys

Interesting regarding the DPF button only working when the light comes on. Thanks for that, I won't get all excited when requesting it.

Reassuringly, I have been on remote tracks in 4Lo and 4Hi grinding along @10-15-20-30Kms/ hour and had a few DPF burns complete in 6 & 8Kms.
I have also been on the highway @ 110Kms/hr and slowed to 80Kms/hr (not on a busy stretch) just to speed up the DPF burn. Instead of 70-100+Kms it would take maybe 50Kms to complete.

So I'm sold, slowing down speeds up the DPF regeneration process.

When I get the ECU update week after next I'll be interested to see what changes.

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

As promised results after the first regen since the upate:
363 Kms before a regen, no recalculation as far as I could tell, this is a surprise to me, it could have been missed? No passive regeneration either even when towing although DPF reached 430C but engine not under much load as 80 Km speed zone. Once 100% reached the DPF temp reached almost 600C and reduced to 56% in 8 Kms before I arrived home and interrupted the burn. Next trip was only a short journey starting with a cold engine, % rose to 58% before the regen restarted when the engine was up to normal temperature. 7Kms later I had reached my destination and the soot had reduced to 8%, the engine had stopped fast idle, (1200 rpm as it is manual) but the DPF temperature was still almost 600C so I left it at normal idle to see what happened. Before the update the exhaust temps would quickly fall at this point but they stayed high and the % continued to drop right down to 0%. The temperatures then began to fall back slowly and I got bored and switched the engine off. So to sum up 363 Kms between regens and a total of 15Km to complete the regen in suburb driving conditions.