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CX60 Inline6 Diesel - 'Fast Idle Engine Cleaning'

1505 Views 25 Replies 6 Participants Last post by  Southeastern
3
The CX60 curse just keeps on giving.

After a couple of weeks, this happened. The engine goes to 1500rpm at tickover and then holds it for however long it decides it needs to do its thing.

Car Speedometer White Tachometer Odometer


As this happened after a couple of weeks of short trips as due to illness I hadnt done my usual DPF preventative measure of a 30-45minute rag up the motorway, I figured it was just a safety measure, and after around 5 minutes it went off. Its not a good thing, the engine is pining away at 1500rpm, and it isn't quiet. My neighbours were getting pissed, but if its once in a blue moon I could cope.

According to Mazda, you should not turn off the engine during this process, so if it happens at 2am, well, yes, you'll look like a proper bellend revving your cars engine.

I read this document, sure its for the 2.2D engine, but I imagine it is the same principles.


Page 9

Font Parallel Motor vehicle Rectangle Document


After a weekend of mainly motorway and long A-road driving, if happened again. This time taking 10 minutes to go off.

So, it made little sense, as I had not done any short trips and this was the first time I had fired up since then.

If this is going to become a thing, that I can't even go to the shops without having to leave the car revving away in either the carpark or my driveway, then this is a serious flaw.

I have used Super Diesel in this tank, so when its empty, Ill put the standard stuff in - but I felt the Super would have been the better option to keep the engine and injectors clear when doing shorter trips.

If anyone has any experience of this, would love to hear your thoughts!

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During this cleaning are you able to drive? Or the car is blocked?
During this cleaning are you able to drive? Or the car is blocked?
You can drive yes, but when you stop and put the car in either N or P, then cleaning process continues. So if its at traffic lights, and you put into N, the car next to you thinks you want a race.
You can drive yes, but when you stop and put the car in either N or P, then cleaning process continues. So if its at traffic lights, and you put into N, the car next to you thinks you want a race.
Is it possible to switch off? What can happened then?
Btw, you put into N at traffic lights??
Had exactly the same system in my Disco Sport and it’s the reason I moved away from diesel. The modern engines with DPFs cannot handle short runs because the engine does not get hot enough to burn off the carbon in the DPF.
I owned a CX-5 Diesel for 4 years from new, that was the most annoying problem with the car that i had.
I pretty sure it´s the same for the inline 6 as it is with the 2.2, a diesel is a diesel. The only positive to take away from it is, at least you can see when the car has gone into "cleaning mode", as i could with the CX-5, most other makes don´t show you that.

When my CX-5 was new, it would go into that mode around every 800 miles, after 4 years, 60000 miles (FSSH and loads of software updates regarding that issue) it would do it every 150 miles.
Don´t whatever you do turn the car off when its "cleaning". As soon as my CX-5 went into that mode i took the car for a drive, using manual gears (Higher revving, as the DPF needs heat) and let it do it´s thing for around 10 miles. Annoying; Yes, costly too. Even after doing it as written above (as my dealer told me to do) i had injectors replaced 3 times, turbo sensors twice and the intake manifold was cleaned 3 times, by shot blasting with walnut shells. Over 5k in repairs, although it was all on warranty even after the warranty ran out..... As its a "known problem"
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I owned a CX-5 Diesel for 4 years from new, that was the most annoying problem with the car that i had.
I pretty sure it´s the same for the inline 6 as it is with the 2.2, a diesel is a diesel. The only positive to take away from it is, at least you can see when the car has gone into "cleaning mode", as i could with the CX-5, most other makes don´t show you that.

When my CX-5 was new, it would go into that mode around every 800 miles, after 4 years, 60000 miles (FSSH and loads of software updates regarding that issue) it would do it every 150 miles.
Don´t whatever you do turn the car off when its "cleaning". As soon as my CX-5 went into that mode i took the car for a drive, using manual gears (Higher revving, as the DPF needs heat) and let it do it´s thing for around 10 miles. Annoying; Yes, costly too. Even after doing it as written above (as my dealer told me to do) i had injectors replaced 3 times, turbo sensors twice and the intake manifold was cleaned 3 times, by shot blasting with walnut shells. Over 5k in repairs, although it was all on warranty even after the warranty ran out..... As its a "known problem"
Whta was your daily distances? How many km per trip? It wasn't warranty repairs?
Had exactly the same system in my Disco Sport and it’s the reason I moved away from diesel. The modern engines with DPFs cannot handle short runs because the engine does not get hot enough to burn off the carbon in the DPF.
I've done 100,000 miles in journeys in VAG diesels over the past ten years, a lot of them being short living in central London, never experienced a single issue. My usual routine of a motorway blast every two weeks seemed to have worked and no silly systems trying to do anything for me.

I don't think this has anything directly to do with the DPF, DPF regen is a different thing and very noisey (my VAG had a DPF regen cycle), according to the Mazda document above, it seems to be 'injector cleaning'. Injector cleaning on a brand new car.

Is it possible to switch off? What can happened then?
Btw, you put into N at traffic lights??
You can turn the car off yes, and when you turn it back on, it goes right back to its cleaning process.

Yes, sometimes. The car makes less noise and vibrations when out of gear, and I am not entirely sure how the gearbox and clutch system works yet (Mazda technicians also unable to tell me), so I don't want to prematurely wear out the clutch.

I owned a CX-5 Diesel for 4 years from new, that was the most annoying problem with the car that i had.
I pretty sure it´s the same for the inline 6 as it is with the 2.2, a diesel is a diesel. The only positive to take away from it is, at least you can see when the car has gone into "cleaning mode", as i could with the CX-5, most other makes don´t show you that.

When my CX-5 was new, it would go into that mode around every 800 miles, after 4 years, 60000 miles (FSSH and loads of software updates regarding that issue) it would do it every 150 miles.
Don´t whatever you do turn the car off when its "cleaning". As soon as my CX-5 went into that mode i took the car for a drive, using manual gears (Higher revving, as the DPF needs heat) and let it do it´s thing for around 10 miles. Annoying; Yes, costly too. Even after doing it as written above (as my dealer told me to do) i had injectors replaced 3 times, turbo sensors twice and the intake manifold was cleaned 3 times, by shot blasting with walnut shells. Over 5k in repairs, although it was all on warranty even after the warranty ran out..... As its a "known problem"
Thanks for this Lee.

I have to turn off the engine when its doing it, I live in a densely populated area and its not practical to go for a drive at certain times due to traffic, work commitments etc. It's like, 'i'll go the Post Office, then have to end up driving around for an hour or sitting annoying my neighbours', what a way to spend £50k.

Mazda never told me this is a 'thing' that I needed to expect.

Its this a permanent feature, it looks like I may have to consider rejecting the car as this is not liveable at all.
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I have owned a Jaguar XF and XJL and the Diesel Particulate Filter drove me nuts. Almost every week I got a “DPF Full“ message. To clear this by burning off excess particulates, I had to drive ten miles at speeds exceeding 50 MPH. Mazda has evidently found a solution that doesn’t require high speed driving. Strangely, I didn’t have the same problem with my Mercedes, but I have an outstanding claim with MyDiesel.com with all three vehicles and expect the Mercedes claim to be the most likely to succeed. Volkswagen has already admitted emission misdemeanors. You possibly don’t get DPF and hence injector problems if emissions exceed those reported due to technology cheats.

I agree with Brianthemodeller and Lee, this is a common problem and a high capacity diesel engine isn’t ideal if you are doing largely short trips because the DPF won’t “burn off” the particulates. Diesel is unsuitable for stop start urban locations and that is why it is discouraged.
I have owned a Jaguar XF and XJL and the Diesel Particulate Filter drove me nuts. Almost every week I got a “DPF Full“ message. To clear this by burning off excess particulates, I had to drive ten miles at speeds exceeding 50 MPH. Mazda has evidently found a solution that doesn’t require high speed driving. Strangely, I didn’t have the same problem with my Mercedes, but I have and outstanding claim with MyDiesel.com with all three vehicles and expect the Mercedes claim to be the most likely to succeed.

I agree with Brianthemodeller and Lee, this is a common problem and a high capacity diesel engine isn’t ideal if you are doing largely short trips because the DPF won’t “burn off” the particulates. Diesel is unsuitable for stop start urban locations and that is why it is discouraged.
Again, I have not found Diesels to be a problem for me, but admittedly this was solely Audi diesels. Never a single issue, and had three of them, all doing short journeys in the week and then large ones at the weekend.

The Audi would do a DPF regen at about 30 minutes into a motorway drive if it needed it, so I did this every 2-3 weeks if it hadnt had a run , and all was well.

This seems to be 'injector cleaning', DPF regens in the Mazda from what I have seen is very loud.

Unless I can find a way to manage this, I think I am getting to the point of being done with Mazda, with the disastrous PHEV to this.

It makes no sense this happened after a weekend of purely motorway miles, I could understand it if like the first time it had done it after a couple of weeks of short journeys.

There is also 'iStop' which cuts the engine out when stopped and coasting, so I can't even get the engine warm sometimes without turning that off. At the same the time as turning Autohold on and turning Lane Assist off, correcting the DPS when it gets it wrong, watching out that the emergency brake isn't going to try and kill me when backing out of the driveway..What a massive polava just to go for a drive.
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That's why I like my current RAV4 hybrid, I get in and go.
That's why I like my current RAV4 hybrid, I get in and go.
Boy do I miss my previous Audi diesel for the same thing!
Again, I have not found Diesels to be a problem for me, but admittedly this was solely Audi diesels. Never a single issue, and had three of them, all doing short journeys in the week and then large ones at the weekend.

The Audi would do a DPF regen at about 30 minutes into a motorway drive if it needed it, so I did this every 2-3 weeks if it hadnt had a run , and all was well.

This seems to be 'injector cleaning', DPF regens in the Mazda from what I have seen is very loud.

Unless I can find a way to manage this, I think I am getting to the point of being done with Mazda, with the disastrous PHEV to this.

It makes no sense this happened after a weekend of purely motorway miles, I could understand it if like the first time it had done it after a couple of weeks of short journeys.

There is also 'iStop' which cuts the engine out when stopped and coasting, so I can't even get the engine warm sometimes without turning that off. At the same the time as turning Autohold on and turning Lane Assist off, correcting the DPS when it gets it wrong, watching out that the emergency brake isn't going to try and kill me when backing out of the driveway..What a massive polava just to go for a drive.
But you cannot turn off and finish cleaning during next trip?
But you cannot turn off and finish cleaning during next trip?
The Mazda document and Lee above says not too.

I can of course, and i'll probably do this while its in warranty so if anything goes wrong because of turning it off, Mazda can pay for it, unless I can find an escape route that dosent cost me.
On the screen there is no information not to turn off the engine. Have you check it in User Manual for CX60?
On the screen there is no information not to turn off the engine. Have you check it in User Manual for CX60?
No nothing on screen, and nothing in the manual about it at all - not that I can find using search words like 'idle' or 'fast'

Maybe Mazda wants to avoid this fu***' nightmare happens...: "youtube.com/watch?v=eBoZsZACh5E".
Maybe Mazda wants to avoid this fu***' nightmare happens...: "youtube.com/watch?v=eBoZsZACh5E".
A 140,000 mile car without any running problems according to the presenters.

All engines suffer coke build up, even petrols. But if you run a Diesel every day for ten years on 1-2 mile trips, that will surely happen, you have to look after a diesel, but being a (semi) responsible adult and car owner, I know what to do, and don't need to wake my neighbours up for the car to do it.

So happy for this system to exist, but allow me the right to turn it off!
Why the injectors have to be cleaned at short distances? I thought that the problem is only with DPF.
Why the injectors have to be cleaned at short distances? I thought that the problem is only with DPF.
Exactly..
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