3 week old Crosstar Rejected

[Jayt43]

My Crosstar rattles like a bag of spanners when charging under no load (and when interior fan is working). This is pretty normal for this engine, even though it's a bit disconcerting!

[Lord Voltermore]

I do wonder how much fossil fuel and city pollution  has been sacrificed in the past  so cars idle as quietly as possible whilst sitting in traffic.      These days with stop /start and hybrids its no longer such an important factor  and manufacturers  are concentrating instead on improved efficiency  on the move. And not just by
mapping tweeks  on existing engines, but optimising new engine designs from the outset. .  The Jazz for instance has an Atkinson cycle engine, which makes some compromises. 

I meant no offence to any of the 7 who have rejected the new crosstar.  Its difficult to accept a discernible deterioration over what is known to have been achieved before  .
I accept that even in 2021 guise its sometimes not  the quietest or smoothest engine out there.   I put this down to being atkinson cycle, and a small price to pay for the other charms of the Jazz.      But if its now significantly worse, and someone else does a better job of it   then even I might have second thoughts. 

     

[Karoq]

I have heard back from my dealer.
So far he has had no incidents of said 'rattling' and he says he has sold quite a few Crosstars, Jazzs and e:HEV HR-Vs.
He will let me know if anything comes to light.

[Kremmen]

With social media I doubt if any dealer is going to admit anything. It could easily backfire on them.

[NoelM]

Dealer contacted me this morning and confirmed that there are software changes on 2023 car and also remapping of engine. They are still investigating rattle etc

[Jazzik]

Did they say remapping or recrapping? 

[Nicksey]

Dealer contacted me this morning and confirmed that there are software changes on 2023 car and also remapping of engine. They are still investigating rattle etc

I wonder if this will be available on my 22 Jazz?

[Kremmen]

It is very rare for any Honda software changes, unless safety related, on any previous model years.

[NoelM]

It is very rare for any Honda software changes, unless safety related, on any previous model years.

No it’s not rare. They just don’t usually tell anyone.

[mitchelln]

I took delivery of my Ex Jazz 3 weeks ago. I haven't noticed any engine rattling either at idle or during general running.

This is my first hybrid and I'm still finding it somewhat disconcerting how the engine note bears no relation whatsoever to throttle position! 

[NoelM]

I took delivery of my Ex Jazz 3 weeks ago. I haven't noticed any engine rattling either at idle or during general running.

This is my first hybrid and I'm still finding it somewhat disconcerting how the engine note bears no relation whatsoever to throttle position! 

This was my second one, so it was easy to tell the difference. Not anymore as it’s gone back. Not prepared to put up with it.

[Lord Voltermore]

This is my first hybrid and I'm still finding it somewhat disconcerting how the engine note bears no relation whatsoever to throttle position! 

Its a bit strange but not as disconcerting as some CVT systems in the past.

 I find  that  you can  control it to some extent.   If  the engine seems to be racing ahead of road speed try easing off the the throttle slightly.  Sometimes this causes the engine speed ,and noise  ,to drop significantly  to pretty much what you would expect at that speed. Then by being more gentle on the throttle you can remain in this 'sweet spot' with  little or no reduction  in  road  performance  . Indeed  you can continue to increase speed  without returning to the 'noisy zone'. And can save a lot of fuel.    

Those times you need the pedal to the metal for near maximum performance the technique wont work.  The car 'knows' it will need more HV  charge soon ,if not immediately,   and wont risk not getting it by slowing the engine down.   Its a clever little blighter.   

[NoelM]

This is my first hybrid and I'm still finding it somewhat disconcerting how the engine note bears no relation whatsoever to throttle position! 

Its a bit strange but not as disconcerting as some CVT systems in the past.

 I find  that  you can  control it to some extent.   If  the engine seems to be racing ahead of road speed try easing off the the throttle slightly.  Sometimes this causes the engine speed ,and noise  ,to drop significantly  to pretty much what you would expect at that speed. Then by being more gentle on the throttle you can remain in this 'sweet spot' with  little or no reduction  in  road  performance  . Indeed  you can continue to increase speed  without returning to the 'noisy zone'. And can save a lot of fuel.    

Those times you need the pedal to the metal for near maximum performance the technique wont work.  The car 'knows' it will need more HV  charge soon ,if not immediately,   and wont risk not getting it by slowing the engine down.   Its a clever little blighter.   

Also depends on how much charge you have in the battery. Acceleration noise not so bad if battery had full charge.
Agree that easing off very slightly also reduced noise from accelerating hard

[Lord Voltermore]

Also depends on how much charge you have in the battery. Acceleration noise not so bad if battery had full charge.
Agree that easing off very slightly also reduced noise from accelerating hard

It also reduces the number of times the car does its 'pseudo' gear changes, which are intended to mimic a 'normal' car and minimise the disconcerting sensation .  Indeed some owners  have never experienced these  at all  ,which suggests they always drive efficiently.     I've had a few,just for  research purposes  of course       

  I get quite a few of those green leaf tree things  now.  I haven't bothered finding out exactly what they are all about ,there is enough stuff to learn. But I guess the more the merrier  - I'll give em a hug. 

[yooser]

Hello,
My 2022 Jazz EX style also has a noisy engine since the first day I've owned it ( from new), it sounds like my old clapped out Ford Escort ,many years ago,which had a very noisy engine even when in good condition !!
My previous car was a Hyundai Ioniq hybrid which also had a noisy engine but not as bad as the Jazz , also using a Atkinson cycle.
I notice that the Atkinson cycle engine was invented by a British inventor in 1882 .
The engines using this cycle nowadays are using very high compression ratios 13.5 to 1 and 'maybe' is part of the reason for the engine noise, perhaps pre-ignition or the software not retarding the ignition sufficiently, I don't really know.
On another tack -- has anyone else found out the appalling awkward to reach locations of the inside fuses ?
I hope that if I have to replace one it's when I'm at home and not on a busy motorway.
I found this out when fitting a hardwire kit for my dashcam .
Cheers from Neale.