Hi all,

I got a newer fiesta a few months ago, I noticed I can barely hear the engine. All you can hear is the bass? of the engine for a lack of a better term, however you can't hear the characteristics like before? Why is this?

I mean you can't hear the little turbo whistle, and throttle responses/release like on my older model. It's a lovey car and more refined than the previous model (espesially at motorway speeds, not that the other one was bad) however I catch myself missing my previous car haha. The older car was still fairly refined and smooth so it seems a bit unnecessary to make the engine this muted. Also the throttle response still isn't as instant as before either? 

Have any of you had the same experience? 🙂

No.

Absolutely not

2 hours ago, DaveT70 said:

Absolutely not

Why? the 99bhp I had before was very torquey & responsive. Almost like a diesel especially in the low revs in 3rd.

Compared to other cars like the polo and Corsa, Ibiza which felt slow compared to it with bigger capacity engines.

I understand when it comes to the design of it, it's flawed with the wet belt etc.

But what percentage of them are actually playing up when well looked after? (We will never know). The 1.0 was by far the most popular engine in the UK for 10 years or so. 

I'm not really sure what you're comparing with what here?

From what I recall of your posts you now have a 2021 95 ps which will be a revised (chain cam) engine? But your profile still says 2017 which presumably was the 99 you mention?

If your point is that you felt the wet belt version felt smoother and sounded better than the chain cam versions, I'd tend to agree.

I've only driven 125 and 155 MHEVs, though, not the 95ps which was relatively short lived. They reverted to the 100ps wet belt in the final Fiestas, though. 

With regard to other makes, I've driven the 95ps VW group triple several times and it's just as gutsy as an ecoboost, with the advantage of having a conventional dry belt. Peugeot Puretech - wet belt, similar issues.

These downsized turbo triples superseded larger normally aspirated engines more or less across the board, Ford included.

From what we have seen on here, examples owned from new, and fully/correctly serviced, seem to fare pretty well. Most of the issues appear to be with cars with multiple owners, where service details cannot be confirmed with 100% certainty.

Whatever, the revised version still has the wet oil pump belt which must be changed at 10 years, and is virtually as big and expensive a job as on the wet belt engine.

 

 

 

 

 

 

On 2/27/2025 at 11:24 AM, Eric Bloodaxe said:

I'm not really sure what you're comparing with what here?

From what I recall of your posts you now have a 2021 95 ps which will be a revised (chain cam) engine? But your profile still says 2017 which presumably was the 99 you mention?

If your point is that you felt the wet belt version felt smoother and sounded better than the chain cam versions, I'd tend to agree.

I've only driven 125 and 155 MHEVs, though, not the 95ps which was relatively short lived. They reverted to the 100ps wet belt in the final Fiestas, though. 

With regard to other makes, I've driven the 95ps VW group triple several times and it's just as gutsy as an ecoboost, with the advantage of having a conventional dry belt. Peugeot Puretech - wet belt, similar issues.

These downsized turbo triples superseded larger normally aspirated engines more or less across the board, Ford included.

From what we have seen on here, examples owned from new, and fully/correctly serviced, seem to fare pretty well. Most of the issues appear to be with cars with multiple owners, where service details cannot be confirmed with 100% certainty.

Whatever, the revised version still has the wet oil pump belt which must be changed at 10 years, and is virtually as big and expensive a job as on the wet belt engine.

 

 

 

 

 

 

I was just seeing if people have noticed how silent this new EB was compared to the previous one, I just thought my previous car was quite exciting the way it sounded haha. As I was thinking back to driving it last summer down the country lanes. Perhaps im beating a dead horse at this point.

As for the car, I just haven't gotten round to updating the photo as I'm not really on here much. 

15 minutes ago, Kieran67 said:

I was just seeing if people have noticed how silent this new EB was compared to the previous one, 

We've often seen the comment on here that the revised engine is noisier, while others comments are in line with yours- see this thread for example: 

https://www.fordownersclub.com/forums/topic/129796-fiesta-ecoboost-mhev-quieter-than-non-mhev-mk8/

(Doesn't really matter about the photo, but having the wrong year just confuses anyone trying to reply to a query).

 

 

On 2/28/2025 at 12:51 PM, Eric Bloodaxe said:

We've often seen the comment on here that the revised engine is noisier, while others comments are in line with yours- see this thread for example: 

https://www.fordownersclub.com/forums/topic/129796-fiesta-ecoboost-mhev-quieter-than-non-mhev-mk8/

(Doesn't really matter about the photo, but having the wrong year just confuses anyone trying to reply to a query).

 

 

Thanks that's quite insightful, I wonder that perhaps it could be the weight of the car being 100kg heavier on average which is surprising. Wasn't the MK7 lighter than the Mk6?

1 hour ago, Kieran67 said:

Wasn't the MK7 lighter than the Mk6?

Not much in it - possibly a few kg depending on version. Mk 6, 7 and 7.5 all pretty much around 1050- 1100kg. All fairly porky though compared to a Mk 1 at around 750kg! 

https://www.flickr.com/photos/triggerscarstuff/albums/72157624865254264/

 

Several sites where you can download old brochures if you want to do a bit of research, such as:

https://autocatalogarchive.com/ford/

4 hours ago, Eric Bloodaxe said:

Not much in it - possibly a few kg depending on version. Mk 6, 7 and 7.5 all pretty much around 1050- 1100kg. All fairly porky though compared to a Mk 1 at around 750kg! 

https://www.flickr.com/photos/triggerscarstuff/albums/72157624865254264/

 

Several sites where you can download old brochures if you want to do a bit of research, such as:

https://autocatalogarchive.com/ford/

Thanks, I will check these out!

On 2/27/2025 at 11:24 AM, Eric Bloodaxe said:

If your point is that you felt the wet belt version felt smoother and sounded better than the chain cam versions, I'd tend to agree.

Yes that is what I meant not as rich sounding. I was going ask, what are the metallic ticking noises on wet belt version? I heard it's the fuel pump?

What version of the Mk 7.5 did you have?

I think the Mk 8 uses a electronic throttle which isn't always as instantaneous or connected. 

On 2/27/2025 at 11:24 AM, Eric Bloodaxe said:

I've only driven 125 and 155 MHEVs, though, not the 95ps which was relatively short lived. They reverted to the 100ps wet belt in the final Fiestas, though. 

What's the reasoning behind going back to the wet belt design? So it's the wet belt but in the newer engine I'm assuming.

On 2/27/2025 at 11:24 AM, Eric Bloodaxe said:

With regard to other makes, I've driven the 95ps VW group triple several times and it's just as gutsy as an ecoboost, with the advantage of having a conventional dry belt. Peugeot Puretech - wet belt, similar issues.

I do think they should have introduced the ecoboost with a dry belt. I read somewhere that the wet belt increases efficiency by just 1%? If that's true then it seems like a lot of effort for such a tiny advantage.

On 2/27/2025 at 11:24 AM, Eric Bloodaxe said:

These downsized turbo triples superseded larger normally aspirated engines more or less across the board, Ford included.

From what we have seen on here, examples owned from new, and fully/correctly serviced, seem to fare pretty well. Most of the issues appear to be with cars with multiple owners, where service details cannot be confirmed with 100% certainty.

This seems like accurate idea of what goes on.

On 2/27/2025 at 11:24 AM, Eric Bloodaxe said:

 

 

 

 

 

 

 

 

 

14 hours ago, Kieran67 said:

What version of the Mk 7.5 did you have?

My 1.0 "wet belt" Ecoboost was a Mk 8 140.

I never heard a "ticking" from mine. There are several threads on possible causes, eg:

https://www.fordownersclub.com/forums/topic/153234-focus-10-ecoboost-ticking-clicking-noise/

https://www.fordownersclub.com/forums/topic/147652-ford-fiesta-ecoboost-10-titanium-x-idle-ticking-noise/

https://www.fordownersclub.com/forums/topic/158089-ticking-noise-10-ecoboost-help-please/

14 hours ago, Kieran67 said:

What's the reasoning behind going back to the wet belt design? So it's the wet belt but in the newer engine I'm assuming.

No idea, but being Ford it was probably cost related.

No, you can't have a wet belt in the newer engine. It's the complete old wet belt engine. The two are very different - reversed head, turbo at the back rather than front, etc. Have a look under your bonnet and compare with your old one.

14 hours ago, Kieran67 said:

do think they should have introduced the ecoboost with a dry belt. I read somewhere that the wet belt increases efficiency by just 1%? If that's true then it seems like a lot of effort for such a tiny advantage.

There's been a lot of discussion on this over the last 12 years. I believe the original concept was that it would last the lifetime of the engine but obviously that didn't work out and the replacement interval was added later.

VWs decision to stick with a dry belt on their 1.0 triple certainly looks prudent in retrospect.

16 hours ago, Kieran67 said:

I think the Mk 8 uses a electronic throttle which isn't always as instantaneous or connected.

Most cars have electronic throttle since the early 2000's.  All of the Mk7's did.  Most of the Mk6's did.

They can be mapped differently though.  They are generally mapped to remain smooth otherwise the throttle would be too sensitive over every bump or pothole.  Often using 'Sport Mode' speeds up the throttle response which also adds the placebo effect of making the car feel faster than it is.  I'm not sure whether there is a Sport Mode on your current model though, or if that is one of the parameters that it adjusts.

 

1 hour ago, TomsFocus said:

Most cars have electronic throttle since the early 2000's

I missed that among all the other points. Trying to remember what the last car I had without was - probably one of the old school indirect injection diesels.

My early Mk 8 ST-L only had "eco" in addition to normal, but it was very responsive anyway. Later cars have Sport but I'm still not sure exactly what version the OP has.

On 3/2/2025 at 3:00 PM, Eric Bloodaxe said:

My 1.0 "wet belt" Ecoboost was a Mk 8 140.

I never heard a "ticking" from mine. There are several threads on possible causes, eg:

I'm pretty sure it's just a characteristic of that particular engine. They all sound like that when they drive past, you can identify its an EB before seeing it. The sound wasn't obvious with the windows up but driving down a narrow street with the windows down slightly it would echo off the buildings lol.

On 3/2/2025 at 3:00 PM, Eric Bloodaxe said:

https://www.fordownersclub.com/forums/topic/153234-focus-10-ecoboost-ticking-clicking-noise/

https://www.fordownersclub.com/forums/topic/147652-ford-fiesta-ecoboost-10-titanium-x-idle-ticking-noise/

https://www.fordownersclub.com/forums/topic/158089-ticking-noise-10-ecoboost-help-please/

No idea, but being Ford it was probably cost related.

No, you can't have a wet belt in the newer engine. It's the complete old wet belt engine. The two are very different - reversed head, turbo at the back rather than front, etc. Have a look under your bonnet and compare with your old one.

I knew they were different designs but I'm suprised they bought it back. Perhaps they had some spare ones knocking about haha. Shame they prioritised the conducter chips to the transits rather than the fiesta's which artificially decreased the popularity of the car. And then it was axed. 

What would a MK9 have looked like? we will never know

On 3/2/2025 at 3:00 PM, Eric Bloodaxe said:

There's been a lot of discussion on this over the last 12 years. I believe the original concept was that it would last the lifetime of the engine but obviously that didn't work out and the replacement interval was added later.

VWs decision to stick with a dry belt on their 1.0 triple certainly looks prudent in retrospect.

Yeah it was a wise decision that

On 3/2/2025 at 4:17 PM, TomsFocus said:

Most cars have electronic throttle since the early 2000's.  All of the Mk7's did.  Most of the Mk6's did.

They can be mapped differently though.  They are generally mapped to remain smooth otherwise the throttle would be too sensitive over every bump or pothole.  Often using 'Sport Mode' speeds up the throttle response which also adds the placebo effect of making the car feel faster than it is.  I'm not sure whether there is a Sport Mode on your current model though, or if that is one of the parameters that it adjusts.

Yes it does have sport mode, which improves it but not sharp as before. Acceleration can be a bit laboured at times. Noticed this when reving it a bit on the daul carrigdeway, there would be a burst of full torque 2 secs, followed by 2 secs of half the amount of torque, then a 2 sec of full torque with my foot fully down on the throttle.

It was taken to the garage recently and they couldn't anything wrong, no error codes. It was serviced in September and they couldn't find any faults also. The old car wasn't like this.

Perhaps it's also the tall gearing on th MK7.5 that makes it feel like a rocket, you can get to 60 with less gear changes.

In my Mk7.5 I once I had an Audi A4 next to me at a set of lights, not sure what engine it was. Put my foot to floor and he struggled to keep up and I could tell he wanted get past me but he couldn't lol, I was really suprised. (I don't usaully drive like this)  After that he was driving behind me really aggressively.