If you want to have a real-time CD monitoring system, it's present on all 2019+ Mazda 3 models and on the 2021 CX5,
Why would it not work above 50 mph? Seems redundant if that's the case.CD is designed to work between 25 to 50mph.
Just to be clear, that reviewer is driving the GTR with the turbo engine. Other posters repeatedly comment that this engine does not have cylinder deactivation.At 15:45, when the reviewer opens up the fuel economy app, it looks like what all our vehicles have, a generic fuel economy measurement that is not in real-time....
Right. It does work at highway speeds and will go to two or zero cylinders when highway cruising under circumstances previously described unless Mazda's gauges and displays are lying. Whether there is a top end speed where cylinder deactivation is no longer applied I could not say. 75 mph is about as fast as I've been going while testing this stuff out. My guess is if you ran this thing to top speed, whatever that is, then let all the way off the gas into coast, all four cylinders would stop firing at 100+ mph.Why would it not work above 50 mph? Seems redundant if that's the case.
Wouldn't you want to have it working at highway cruise speeds?
I don't think so and I'll tell you why.I think most cars on the road stop injecting fuel when you are coasting down or engine breaking. That's not really cylinder deactivation, it's just a benefit of electronic fuel injection. When the display says zero cylinders it's just not injecting fuel because there is no load on the engine.
This Is not true. I had the cruise set to 70mph and watched the display drop to 2 cylinders.CD is designed to work between 25 to 50mph.
I don't think so and I'll tell you why.
First, I'm looking at a "cylinder deactivation" display that shows no cylinders active under certain condition. So, the display would have to be lying.
More importantly, the display will show zero cylinders (with the real time mpg gauge jumping to and buried at 80) in situations other than outright coasting. If you are highway cruising and let off the gas enough but not all the way, you can see zero cylinders displayed and mpg buried at 80.
I think I'll stop talking about this until somebody else actually does some testing in a model with the same display features. It's pretty easy to do.
CD and coasting when no load and minimal fuel spray are 2 different things.I don't think so and I'll tell you why.
First, I'm looking at a "cylinder deactivation" display that shows no cylinders active under certain condition. So, the display would have to be lying.
More importantly, the display will show zero cylinders (with the real time mpg gauge jumping to and buried at 80) in situations other than outright coasting. If you are highway cruising and let off the gas enough but not all the way, you can see zero cylinders displayed and mpg buried at 80.
I think I'll stop talking about this until somebody else actually does some testing in a model with the same display features. It's pretty easy to do.
Deceleration fuel cut zone |
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Wow. Can’t say I ever felt a thing such as a jolt. If mine is switching I don’t know it.I’m surprised more CX-5 owners aren’t complaining about CD. There are quite a few complaints from CX-30 and Mazda3 owners across different forums.
It really ruins it for me. The subtle jolt when switching from 4 to 2 and resonating vibration when running on 2 cylinders under 2k is incredibly annoying for someone like me.
Add my 2020 and my daughter's 2019 to the list where this does not ever happen....
If you’re cruising at around 1500 RPMs with your foot steady on the gas and light load(minor incline) it’s impossible to not notice.
It’s likely your driving styles or you just don’t notice it because you’re not as in tune with your cars as I am. That’s not at all meant to be offensive I’m really sensitive to things like this.
My wife has no idea it’s happening. Her driving style also includes constantly being on and off the gas, which means CD in’t kicking in as much.
If you’re cruising at around 1500 RPMs with your foot steady on the gas and light load(minor incline) it’s impossible to not notice.
I can't say I've detected what you've experienced and I think I'm pretty sensitive to what goes on.I would hope not considering it was manufactured in July 2020 and I purchased it 2-3 weeks ago.
For me, the vibration that can be felt when running on 2 cylinders isn’t bad at all, it’s the transition from 4 to 2 that bugs me.
I’m sure it isn’t easy to disable, but who knows, maybe it could be as simple as the resistor mod for some Honda’s that only impacts CD( and maybe the temp gauge?).
It’s likely your driving styles or you just don’t notice it because you’re not as in tune with your cars as I am. That’s not at all meant to be offensive I’m really sensitive to things like this.
My wife has no idea it’s happening. Her driving style also includes constantly being on and off the gas, which means CD in’t kicking in as much.
If you’re cruising at around 1500 RPMs with your foot steady on the gas and light load (minor incline) it’s impossible to not notice.