Author Topic: Excessive revs on start-up  (Read 35554 times)

Offline Bert321

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Re: Excessive revs on start-up
« Reply #15 on: July 17, 2016, 08:19:31 am »
I have a 2015 Mazda 6 with the same 2.2 diesel engine.  Mine does the high rev thing, but only on warmer 'mornings'.  I'd say it's nothing to do with fuel, more to do with ambient temperatures.

Offline Anchorman

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Re: Excessive revs on start-up
« Reply #16 on: July 17, 2016, 11:45:54 am »
No don’t worry.  One of the parameters for high start up revs is air intake temp at 15C or higher at start up.  Mine is doing it virtually every time at the moment.  France is usually a good place for fuel and they sell high grade at virtually every garage.  Mine only ever has high grade fuel or branded fuel and Millers Eco Diesel.

I’ve got a pdf on this starting revs thing if I can just find it!
Eagles may soar high but weasels don't get sucked into jet engines.......

Offline xtrailman

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Re: Excessive revs on start-up
« Reply #17 on: July 17, 2016, 11:59:33 am »
Or you could read my last post.  ::)
Was 2013 Mazda CX-5 175 AWD sport nav Man 1663kg
Now 2015 Mazda CX-5 175 AWD sport nav Auto 1703 kg.
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Offline Anchorman

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Re: Excessive revs on start-up
« Reply #18 on: July 17, 2016, 11:20:00 pm »
Or you could read my last post.  ::)
He started it ;-)

Maybe it was your post I read and not a PDF!
Eagles may soar high but weasels don't get sucked into jet engines.......

Offline Howard

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Re: Excessive revs on start-up
« Reply #19 on: July 18, 2016, 12:18:10 pm »
Hi,my CX5 also does this sort of revs on startup,it does seem to be an intermittent feature. It doesn't effect the drive from cold.
H

Offline xtrailman

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Re: Excessive revs on start-up
« Reply #20 on: July 18, 2016, 06:39:23 pm »
Hi,my CX5 also does this sort of revs on startup,it does seem to be an intermittent feature. It doesn't effect the drive from cold.
H

It's not really intermittent, that suggests a fault.
It will only rev providing the set conditions are met for it to operate as mentioned in the email from Mazda.

At least now I have the auto selecting rev immediately after starting drops the revs back to normal.
Was 2013 Mazda CX-5 175 AWD sport nav Man 1663kg
Now 2015 Mazda CX-5 175 AWD sport nav Auto 1703 kg.
 Towing a 1565kg Bailey Valencia 2011 model.

Offline Howard

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Re: Excessive revs on start-up
« Reply #21 on: July 19, 2016, 06:12:11 am »
Hi, ok it happens now & again,there doesn't seem to be any set pattern. I think intermittent and sometimes are both the same. Either way it's always done it from new & seems to be part of the engine management design for what ever reason.
Howard

Offline ROCKETRON

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Re: Excessive revs on start-up
« Reply #22 on: July 19, 2016, 09:44:46 am »
Yes mine has done this from new also, under certain conditions. I have always just put the auto in reverse with  the brake on and they immediately go down to normal, then its ok rest of the day..

Offline Southern Teuchter

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Re: Excessive revs on start-up
« Reply #23 on: July 19, 2016, 11:32:40 am »
Yeah mine does this and always has from new.  I drive on it straight away and it typically returns to normal revs within 10-15 seconds.  Seemed like a pretty normal thing to do TBH.  Never worried about it.  LOL
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Offline raypaice

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Re: Excessive revs on start-up
« Reply #24 on: October 14, 2017, 11:35:49 am »
I pay £30 tax thanks to the SkyActiv efficiency and the high rev condition is a small, if annoying, price to pay.

Offline Topper

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Re: Excessive revs on start-up
« Reply #25 on: August 04, 2018, 06:14:25 am »
Hi
new to forum and new to Mazda Cx5 too.

I actually only came on to find out if anyone else had this high rev on some start ups................... and it appears to be a normal thing.

Must admit it is a bit annoying when the weather is quite fine and warm and then everyone from work is looking at you and saying "summat wrong wi that lad" ;D

Well nice to meet you all anyway

Tops

Offline Anchorman

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Re: Excessive revs on start-up
« Reply #26 on: August 04, 2018, 06:38:35 pm »
You have to consider why it is doing it. Mazda are obligated under legislation to keep emissions down. This revving is not a “fault” or an “issue”, it is an intentional design function to speed up the efficiency of the catalytic converter.  I’ve heard some people say that you can defeat it by putting it in gear!  Well done, all that does is extend the warm up and increase harmful emissions.  There is no need to fret about it.  Leave it alone and let it get on with it.
Eagles may soar high but weasels don't get sucked into jet engines.......

Offline raypaice

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Re: Excessive revs on start-up
« Reply #27 on: August 04, 2018, 08:22:14 pm »
My concern is that this process can dump unburnt fuel into the engine oil eventually requiring an oil change outside services. I have had this once anyone have similar experiences?

Offline Bert321

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Re: Excessive revs on start-up
« Reply #28 on: August 05, 2018, 08:29:35 am »
My concern is that this process can dump unburnt fuel into the engine oil eventually requiring an oil change outside services. I have had this once anyone have similar experiences?
It's failed dpf regens that dump oil into the sump, not high revving on start up.

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Re: Excessive revs on start-up
« Reply #28 on: August 05, 2018, 08:29:35 am »