In reply to Mazdax605 :
For a "set and forget" kind of car, I'd avoid it on anything.
Note that Honda was disabling an entire bank of cylinders (you kind of have to, on a V6) and this was resulting in some severe wear issues thanks to that bank running significantly cooler.
I guess nobody remembered the Cadillac V8-6-4. Or they were chock full of "Oh, but I know what I'm doing!!" hubris.
In reply to Mazdax605 :
CD, DOD, VDE, whatever you want to call it, I'd avoid it. The idea has a lot of merit, but it just has not translated into the real world. So it's an expensive thing that adds not a lot.
alfadriver said:In reply to Mazdax605 :
CD, DOD, VDE, whatever you want to call it, I'd avoid it. The idea has a lot of merit, but it just has not translated into the real world. So it's an expensive thing that adds not a lot.
If this is the problem that it seems to be, what do you think Mazda will do to rectify it beyond the computer reflash to up the oil pressure to the HLA's?
In reply to Mazdax605 :
Other than getting sued so that they have to turn it off, I don't see them doing anything.
What they *should* have done was pay attention to Toyota's very simple and very efficient new motor, which blows us all out of the water. Copy that, as it's exactly the same concept that Mazda was going for with this new direction- simple and efficient.
alfadriver said:In reply to Mazdax605 :
Other than getting sued so that they have to turn it off, I don't see them doing anything.
What they *should* have done was pay attention to Toyota's very simple and very efficient new motor, which blows us all out of the water. Copy that, as it's exactly the same concept that Mazda was going for with this new direction- simple and efficient.
Could shutting it off be an option for the consumer at some point? I know people have used kits to shut down the GM DoD system. Could you see it being an option for the Mazda motor? I know you're in the industry, that's why I value your opinion.
The only reasons consumers can turn off GM's system is that someone has hacked their code. For sure, it's not legal for GM to take it off, unless they go through a huge process with certification. Same goes for Mazda- the process to legally take it off would have some repercussions, and I don't see them taking it off without instruction from agencies.
If someone else hacked their system, then it would be possible for the individual consumer. But I also don't see that much- not many people hack Mazda's systems.... And, technically, that would not be legal for sale, too... On a theoretical basis, companies like HP tuners face some pretty harsh penalties if too many people defeat cars and the wrong people notice. Just not legal to sell a device that is a defeat device.
First I've heard about this issue--good to know.
I'd look for an older CX-5 w/o the deactivation. These Skyactiv 2.5s are very reliable and efficient. My dad has had zero issues with his for the past 3 years (in a 3, not a CX-5 mind you). If you ask Mazda, Toyota copied them.
alfadriver said:The only reasons consumers can turn off GM's system is that someone has hacked their code. For sure, it's not legal for GM to take it off, unless they go through a huge process with certification. Same goes for Mazda- the process to legally take it off would have some repercussions, and I don't see them taking it off without instruction from agencies.
If someone else hacked their system, then it would be possible for the individual consumer. But I also don't see that much- not many people hack Mazda's systems.... And, technically, that would not be legal for sale, too... On a theoretical basis, companies like HP tuners face some pretty harsh penalties if too many people defeat cars and the wrong people notice. Just not legal to sell a device that is a defeat device.
GM also uses by-and-large the same hardware for the DOD and non-DOD engines, so DOD can be disabled not only in software, but hardware retrofitted to eliminate the lifters that tend to fail.
This is why I'm really curious to see how the system works, being somewhat familiar with the Duratec/MZR family of engines. I'd think they had to make alterations.
As far as HPT goes, the earlier versions of the software allowed you to disable certain emissions components on Diesels. I don't know if they got a strongly worded letter or what, but subsequent versions eliminated that functionality. Presumably, it's not an issue for gasoline engines because the main reason people turn off error checking is because they are swapping into emissions-exempt chassis. (Mostly.)
In reply to Knurled. :
There are alterations. And it's not nearly as simple a system as GM's is, nor is it as simple as the one Honda can use- which is a VTEC derivative. But it's more similar to the latter than the former.
Either way, if you can get a version of a vehicle without it, regardless of who makes it, I would go that path. No real data suggests that it's worth it.
The frustrating thing is it's hard to find a CUV that doesn't have a CVT and the CX-5 seemed like our best bet. It is our favorite one to drive. Now I don't know what to get. The 4Runner should be leaving via vroom soon and we'll need a car to replace it.
Mazdax605 said:The frustrating thing is it's hard to find a CUV that doesn't have a CVT and the CX-5 seemed like our best bet. It is our favorite one to drive. Now I don't know what to get. The 4Runner should be leaving via vroom soon and we'll need a car to replace it.
there is always the turbo renegade
Check out the new Rav4 Hybrid. For an $800 premium over a regular AWD model, you get a smoother, more powerful and more fuel-efficient powertrain. Quite tempting IMO
In reply to alfadriver :
I'd be interested in hearing about what makes Toyota's new motor so special... It certainly does get fantastic real world fuel economy in my experience, even if it's loud and pretty coarse.
G_Body_Man said:Check out the new Rav4 Hybrid. For an $800 premium over a regular AWD model, you get a smoother, more powerful and more fuel-efficient powertrain. Quite tempting IMO
The last Rav-4 was on our list of cars we liked, but we liked the handling and feel of the CX-5 better, but this CD problem has me concerned. Does the Rav-4 use CD?
morello159 said:In reply to alfadriver :
I'd be interested in hearing about what makes Toyota's new motor so special... It certainly does get fantastic real world fuel economy in my experience, even if it's loud and pretty coarse.
Really good engineering, that's it. It's a very basic 2.5l motor, but it's incredibly efficient and clean- the only "tech" one could even consider for it is direct injection- and that's been around for over a decade now. Other than, there isn't anything special about it- and that's exactly what makes is special. It should be leading to a bunch of new 200hp 2.5l engines out there, and I'm pretty shocked that there are so few copiers of that engine.
In reply to Mazdax605 :
It does not, it has the same 2.5l engine Alfa is referring to.
Theres a huge thread (40 some pages) on Mazdas247. A lot of it is unhelpful, but it might be worth a read.
I recommended one of these cars to some friends, saying the powertrain had been really solid for my dad. So I am interested in this issue.
It sounds like the oil pressure drops when the CD kicks in on cyl 4, and when it comes back on for an aggressive acceleration (a situation that occurs when you travel 20-55, which is the only time CD is on), there isn't enough oil pressure and the HLA aka tappet doesn't have enough pressure and it causes the rocker arm to malfunction (break or fall off somehow).
It seems like the reflash could solve the low oil pressure on return from CD, but I get the reticence. I hope they come up with a way to disable it.
Leased this today. Really love the CX-5, but the CD worries me. Picking it up next week. 
CyberEric said:Theres a huge thread (40 some pages) on Mazdas247. A lot of it is unhelpful, but it might be worth a read.
I recommended one of these cars to some friends, saying the powertrain had been really solid for my dad. So I am interested in this issue.
It sounds like the oil pressure drops when the CD kicks in on cyl 4, and when it comes back on for an aggressive acceleration (a situation that occurs when you travel 20-55, which is the only time CD is on), there isn't enough oil pressure and the HLA aka tappet doesn't have enough pressure and it causes the rocker arm to malfunction (break or fall off somehow).
It seems like the reflash could solve the low oil pressure on return from CD, but I get the reticence. I hope they come up with a way to disable it.
This is the thread that scared me the most.
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