New Yaris Hybrid - weird and loud noise from the engine

[TonyHSD]

55 minutes ago, mjjferreira said:

Hello guys,

Today i drove to a dealship/toyota and did a test drive of another yaris (with 17k miles) and it has nothing to do with mine. Despite the test drive car was turned on for the first time today (ICE was cold) it was MUCH, MUCH smoother and quieter than mine (that was already warm), both in idle and acceleration.

Mine (it has 250 miles) sounds and feels like an agricultural tractor compared to it. After i drive the other yaris as soon as i started driving mine again it was like a total different car...a tractor with a bassy loud engine.

Also the accelerator response was much better in the other yaris. When i hit the accelerator in the other yaris the engine sounded and felt like a proper gasoline engine, doing the same in mine it sounds like a diesel/tractor engine with a subwoofer under the hood.

One last note: After i drove mine, i stopped at the dealship (the ICE was on) ...i opened the door to speak to the sales man, and as i was speaking with him, the opened door was shaking due to the amount of vibration caused by the engine.

😞

I feel sorry for you. Your car might have a serious problem or defective part. Have you pushed them to investigate? You should ask for that and eventually if not fixable reject the car. What can cause similar behaviour: 

Egr system, engine/transmission mounts, clutch damper, fuel. Many things to think about and check but on brand new car it doesn’t sound right. 
Push them hard to get it fixed. 
Good luck 👍

[mjjferreira]

Yes, i will push them.

Next step is to schedule a test drive with a toyota engineer to allow them to evaluate the car, asap (At weekends only sales guys are in the facility).

i am sad. 😞

 

[Cyker]

Okay that's good to know - Good thing you checked with another car!!

That proves there is a problem so now make it the garage's problem - Car is still under warranty so they need to sort it out.

I do wonder if it is that issue I mentioned about the drive plate between the ICE and the PSD not being torqued down properly. At least one other member on here reported that problem a year or so ago IIRC.

Annoyingly I can't find the post to see if they resolved it and if there was a TSB attached  

[mjjferreira]

24 minutes ago, Cyker said:

Okay that's good to know - Good thing you checked with another car!!

That proves there is a problem so now make it the garage's problem - Car is still under warranty so they need to sort it out.

I do wonder if it is that issue I mentioned about the drive plate between the ICE and the PSD not being torqued down properly. At least one other member on here reported that problem a year or so ago IIRC.

Annoyingly I can't find the post to see if they resolved it and if there was a TSB attached  

My car has only two weeks. 😞

 

What is a PSD?

...and also a TSB?

(sorry)

[Cyker]

Sorry, I do tend to use too many acronyms without explaining them!

Power Split Device (Basically the hybrid system) and Technical Service Bulletin (Toyota and most car makers have a database of known faults and how to rectify them)

[mjjferreira]

Understood.

Thanks a lot Cyker.

[Cyker]

No worries, let us know how you get on! I'd love to know what the cause is!!

[mjjferreira]

I will! 🙂

 

[anchorman]

Toyota are right at the top in terms of mass production.   They tend not to have big variations between products.  Where did you get your petrol?

[mjjferreira]

7 hours ago, anchorman said:

Toyota are right at the top in terms of mass production.   They tend not to have big variations between products.  Where did you get your petrol?

Hello,

The car was built in France.

I am from Portugal. 🙂

 

[anchorman]

7 hours ago, mjjferreira said:

Hello,

The car was built in France.

I am from Portugal. 🙂

 

The engine will automatically retard the ignition according to what fuel you out in.  Try some higher octane fuel which will sweeten the timing.  

[mjjferreira]

1 hour ago, anchorman said:

The engine will automatically retard the ignition according to what fuel you out in.  Try some higher octane fuel which will sweeten the timing.  

I filled the tank with very good fuel 2 days after i picked up the car. (It's the same station and fuel i use in my Corolla Hybrid 2.0)

Today i left the car at the dealship to be checked by the engineers. We did a short drive with it and the engineer states that there was a weird sound indeed.

The car will be staying there today and probably tomorrow to have some tests done.

Toyota guy also said that since this engine is "new", the common problem database is very reduced, and if they can't find the root cause they will write a letter and ask for help to toyota global.

[anchorman]

This forum is somewhat woke snowflake when it removes the opposite of advanced timing.   It’s a technically accurate word but obviously capable of offending some poor darling.  What is the world coming to.  

[FROSTYBALLS]

4 minutes ago, anchorman said:

This forum is somewhat woke snowflake when it removes the opposite of advanced timing.  

Correct word inserted into your post.

[GR Weasel]

from what you describe Does not sound normal to me. almost like only 2 cyinders are working instead of 3. 

[mjjferreira]

The engineer already did a road test and collected all log files.

He will next do the same road test with a "good" yaris and try to compare the results/files.

For some weird reason, the main noises that were happening with me at home (heavy knocking) are not happening in the dealship with him.

The only thing that we could replicate is the abnormal rumble (aka diesel engine) sound when the car is being drived, but the heavy knocking still missing so far.

[mjjferreira]

News update.

Dealship called a couple of hours ago.

Rumble noise when driving is supposly identified. The exaust line was not fully attached.

As for the heavy knocking sound in the engine bay, they did not manage to replicated it.

Tomorrow i will pickup the car and check how it will behave the next days.

If knocking returns, i will try record it and take the car to toyota, again.

[Nixy]

Good luck, my friend.

[anchorman]

11 hours ago, mjjferreira said:

News update.

Dealship called a couple of hours ago.

Rumble noise when driving is supposly identified. The exaust line was not fully attached.

As for the heavy knocking sound in the engine bay, they did not manage to replicated it.

Tomorrow i will pickup the car and check how it will behave the next days.

If knocking returns, i will try record it and take the car to toyota, again.

Service department placebo placed.  Unless the exhaust was knocked there is absolutely no chance it was out of alignment.

[mjjferreira]

As a matter of fact, a couple days ago i was looking at the rear of the car and noticed the exaust was a little offset but thought it was normal.

However, i believe the exaust alignment will only fix the minor noise (rumble) i was hearing. The heavy knocking sound coming from the engine i am sure it has nothing to do with it.

[Ken Adams]

I have a new (2months old) Yaris Hybrid design and on start up you hear the ICE engine normal noise. After about 30 secs a much louder noise cuts in, sounding like a large compressor. This lasts for another 30 secs. The Dealer, steven Eagell of Chelmsford witnessed the noise and told me it was "part of the warming up sequence" and nothing to worry about.

I would like to know other members views and experiences.

[mjjferreira]

It sounds like mine.

2 questions:

- Is the sound during those 30 seconds similar to a knocking sound?

- Does it happen every day?

[Nixy]

17 hours ago, Ken Adams said:

I have a new (2months old) Yaris Hybrid design and on start up you hear the ICE engine normal noise. After about 30 secs a much louder noise cuts in, sounding like a large compressor. This lasts for another 30 secs. The Dealer, steven Eagell of Chelmsford witnessed the noise and told me it was "part of the warming up sequence" and nothing to worry about.

I would like to know other members views and experiences.

Unfortunately this awful noise is "normal".

[CPN]

I am still struggling to understand why people think that the sounds of a Mk4 Yaris during its cold start-up sequence can be described as "an awful noise"?! It's a petrol engine hybrid car! What do people expect? Silence?

Not withstanding that, it is a 3 cylinder engine (think, unequal exhaust manifold lengths in a Subaru for example - in terms of sound...) that is highly technical in operation in the way it switches cycle types under computer control during the warm up phases. So, given that they didn't include a balance shaft but instead chose another method (that's been explained elsewhere), it is bound to be a little more "noisy" than the Mk3 was during the same period of time.

Personally, I don't find mine unusual at all. Yes, it is a bit noisier than my previous Mk.3 but, in my opinion, not in a bad way...

[Cyker]

I don't think the OP's issue is the 'normal' diesel-esque knock the M15A has at lower revs, as the way he's described it it sounds much more severe, but it's hard to know without hearing a recording of the sound.

I'm less sensitive to that rough engine vibration sound because I'm a diesel person, but I could imagine anyone coming from e.g. the buttery-smooth 1NR-FE being a bit surprised and concerned about how unrefined the M15A is when it's at low RPM, and even I find it quite obnoxious when it's charging while stationary, to the point I'm taking alternative routes to try and avoid being stationary, even if they are longer!!)

The engine sounds best at 2k rpm and above for sure, then it develops a nice growl