Engine Vibration on Start-Up

[5thcivic]

Why would you spend so much on an expensive car like a Jazz... only to leave it on the drive!

The miles prove it is not always on the drive      No commuting anymore, it's a second car for longer trips where the oil can warm up a bit, the E does all the local shopping, couple of miles back and forth.

[CB72]

Can I have the crown please? Sep 22 and 1218 miles.   

Wow!

Why would you spend so much on an expensive car like a Jazz... only to leave it on the drive!

Because he's got an even more expensive car to to drive around in

[Jazzik]

Can I have the crown please? Sep 22 and 1218 miles.   

Wow!

Why would you spend so much on an expensive car like a Jazz... only to leave it on the drive!

Because he's got an even more expensive car to to drive around in

I wonder how many miles the E has on the odometer (and in how much time)...

[coldstart]

I don’t think it is the vtc. The sound was louder, more metallic and lasted much longer. Also the car was shaking/trembling. I’m unable to find something similar online, so it is hard to explain.

For me it's interesting that, if I use the car as normal (i.e. 4-5 times a day) and park overnight, no issues at all. It runs very sweetly. But if I left it for a week without using, I'm sure the fault would occur again.

That would fit in with my theory about the high pressure fuel rail. The pressure, and possibly the fuel level might be gradually dropping. Not enough to cause any problems  if only left for a few days, but after a week  the car might be initially starting with an  insufficient fuel/air mixture . The new and efficient engine might still  fire up immediately  and run roughly on a couple of its cylinders  until its firing on all cylinders.

Your theory (low pressure in the fuel rail) doesn't explain the rattling.
The only thing that could cause a rattling this loud is the timing chain.

Moreover, you all seem to ignore that previous Honda engines (not only in the Jazz) had the exact same symptoms with exactly the same failure description.

[Hector]

The usual way to start a keyless car is to press the brake and the ignition button at the same time as we want to start.


 This procedure is wrong, especially at low temperatures.


 The correct way is to press the switch once without pressing the brake pedal, which also unlocks the steering wheel.


 Then press the switch a second time without pressing the brake pedal.

 At this stage all the indicator lights come on.


 After the lights go out THEN press the brake and a third time the switch to start the thermal engine.

 Try it and you won't have any problem.

[Lincolnshire Rambler]

I tend to agree with Lord Vs comments . When the PCM calls for the ICE to start it does so very quickly and this makes it very different to a 12v starter motor spinning the engine to 300/400 rpm . It can spin to 2000 + rpm in seconds . The 80kw drive motor makes easy work of starting ! You can’t compare normal petrol engines in older Hondas , even if they experience similiar sounds or apparent affects . If the fuel rail looses pressure the PCM can still start the ICE engine and as it will know the fuel pressure it can decide to continue to run , as it will probably know using cylinder anti knock sensors if it’s running as expected within a few seconds . I don’t see the variable valve drive chains loosing the tensioner oil pressure causing the severe vibration -my view is the very fast starting speed would instantly cause catastrophic failure of the valve drive train if the tensioner had issues .

[5thcivic]

I wonder how many miles the E has on the odometer (and in how much time)...

1448 from June 21 

It's the better car to drive, but the fact you can enjoy driving the Jazz and not feel inferior says a lot for the Jazz hybrid system, performance from traffic lights and comfort.

[NoelM]

Have a look at this for engine vibration.

https://www.crvownersclub.com/threads/2018-crv-shakes-vibrates-on-cold-start.221722/

[Lincolnshire Rambler]

Hector raises an interesting view. I guess once the stage of the indicator lights coming on this could trigger the fuel pump to start and then stop to pressure the fuel rail fully . In many conventional ICE cars you can sometimes hear that pump start and then stop ahead of starting the engine . Maybe that makes sense to follow Hectors steps after parking up for a while ?

[Marco1979]

Car hadn’t been used for 6 days. Camera rolling and then starting the engine using the button. Smooth as always! Apparently it knows it is being filmed  . Hope it was a one-time-event.

[CB72]

With all the talk of vibrating engines, flat batteries and unfolding wing mirrors, I'm beginning to get start-up anxiety 
Although I've had none of those things myself.

[Jazzik]

Unfortunately, I'm missing all that excitement (so far) too.

[Nicksey]

With all the talk of vibrating engines, flat batteries and unfolding wing mirrors, I'm beginning to get start-up anxiety 
Although I've had none of those things myself.

Don't forget to add delaminating windscreen to that list now 

[davejazz]

The usual way to start a keyless car is to press the brake and the ignition button at the same time as we want to start.


 This procedure is wrong, especially at low temperatures.


 The correct way is to press the switch once without pressing the brake pedal, which also unlocks the steering wheel.


 Then press the switch a second time without pressing the brake pedal.

 At this stage all the indicator lights come on.


 After the lights go out THEN press the brake and a third time the switch to start the thermal engine.

 Try it and you won't have any problem.

I have used this 3 stage start up, many times, as I like to programme the satnav, before I start the engine. Purely a habit. Is it mentioned in the handbook, as a good idea?

[Jazzik]

It took me a day but I didn't find this 'good idea' in the manual. Maybe try yourself...
https://www.honda.co.uk/cars/owners/manuals-and-guides/honda-owners-manuals/_jcr_content/par1/textcolumnwithimagem_1653971839/textColumn/richtextdownload_90f/file.res/2021%20Jazz%20Owner%60s%20Manual.pdf