Hey Everyone, I'm new to Briskoda, found loads of helpfully info to wrench on my scoda recently. But hot to step forward and ask you all a question....

 

First thing gs first, I have a 2016 150 yeti monte carlo. Pretty much standard inside and out with just over 80000. Owned the car since 10000 miles and it's my favorite car that iv ever driven.  My friend has a business and installed a map on it, giving it 195hp but really put towards the economy side as I do a lot of miles and I'm not a speed junkie. 

 

So my problem is, the car has been progressive getting a little worse on MPG! I used to be able to sit at 75 and get 45mpg. But now I have to really really baby the throttle and be more sensitive with it. If I sit at the same speed now I will br luck to achieve 40mpg. 

 

It's like when the turbo spools a but it drinks fuel. Even though I'm not gunning it. 

 

Engine work done in last few thousand was the timing belt by myself (i know a bit late but hey, better late than never) but everything was perfect when I changed it a month ago. At this time I got a TPF particulate filter problem, which I replaced with oem part at like £85. But it still feels a little sluggish and drinking more fuel than normal.

 

Sorry for the novel guys, any help much appreciated 

Seems that you know what the issue is.

Best have someone that knows these engines go over the work you have carried out. 

 

Did the friend write the new Engine Management / map or get it from someplace. 

It is them that you really need to talk with.

More BHP & Nm's is great if it allows you to get up to speed quicker then coast and actually get better MPG's. 

 

So if the engine management / remap was fine & you drive sensibly still it will be your regens causing the extra use of fuel. 

So get someone to check my timing job? 

 

Also my friend has a business mapping cars, campers, lorries, tractors etc and has really good experience and reviews. Otherwise I wouldn't of had one done by him.

 

So the car is doing more frequent regens on this map it has, would it be better if it went to a specialist that knows VAG engines? 

 

Thanks for your reply @roottoot

25 minutes ago, Peebs101 said:

I got a TPF particulate filter problem, which I replaced with oem part at like £85

Did you mean DPF?
What part did you replace for £85?

@Peebs101Is your friend with the business not a mechanic / motor engineer and with experience of diesels since he or she does tractors, lorries etc?

Has the drop in economy happened since the remap or the timing belt change? Or the TPF whatever that may be replacement?

 

If so that is where you should start.

 

At 80k miles the throttle valve will likely be completely clagged up with soot from the EGR port, cleaning this will result in much increased economy if it was clagged.

@roottoot yes he is a mechanic, I'm also a mechanic, don't think I'd be messing with timing if I wasn't haha.

 

Nothing has gotten worse or better after timing belt change and map has been on for 2 years woth no issue. 

 

Just last 3-4 months it's been getting harder yo get the economy out of the car. 

 

Sorry it was the DPF I changed, there are 2 next to each other on the top of the engine with one hose going into each. It was like £70odd +vat. I only did this as it tripped the EML. I changed and cleared codes.

I generally do 400 to 500 miles a week regular long and short runs. 

 

The car is also super smooth in low range with no problems. No rattles or strange vibrations. Just when the revs go above 2k and uses a bit of turbo it really wants yo drink. 

 

Like instead of sitting at 72 where i get 45mpg + if I sat at 76 it would be down at like 35mpg

55 minutes ago, J.R. said:

Has the drop in economy happened since the remap or the timing belt change? Or the TPF whatever that may be replacement?

 

If so that is where you should start.

 

At 80k miles the throttle valve will likely be completely clagged up with soot from the EGR port, cleaning this will result in much increased economy if it was clagged.

Thanks @J.R.

 

Nothing  changed after timing belt. Dpf  was only changed as it tripped the EML. changed and cleared codes and all was okay

 

 

I will check the throttle body this week for gunk etc to see if its sorted up.

29 minutes ago, Peebs101 said:

Sorry it was the DPF I changed, there are 2 next to each other on the top of the engine with one hose going into each. It was like £70odd +vat.

What exactly was it you changed?
A DPF for the Yeti is more like £1000+.

Edited 18 September, 20223 yr by Urrell

Hi

 

You say  "there are 2 next to each other on the top of the engine with one hose going into each. It was like £70odd +vat".   As the DPF sits in the exhaust pipe and costs more like £750 it clearly wasn't that. 

 

Was it the DPF differential pressure sensor that you changed ??

Edited 18 September, 20223 yr by Austin 7

@Urrell Now more like £498 as advertised in various places from 110 PS- 140 PS TDI's.

 

 

Edited 18 September, 20223 yr by roottoot

It was called,  "

(tpf) particulate system, circuit A" on the computer that was plugged in.

 

Here's a photo of the damaged one....

I found it on auto doc but I bought it from my local TPS in Scotland. It was like 85 quid from them. Wish I bought it from auto doc now 😪

That is an exhaust pressure sensor.
I suggest you look up and learn about the DPF and the problems if not cared for.

 

 

 

 

This might help.

http://briskoda.net/forums/topic/484808-dpf-cleaning-temperature

http://briskoda.net/forums/topic/476154-dpf-soot-load-calculated-vs-measured

http://briskoda.net/forums/topic/500625-soot-increased-during-forced-regen

 

@Urrell@roottoot thanks very much guys. I will look into that. 

 

Do you think he map I'm using could make the dpf to clog or is this just something  I need to do? 

 

Does an egr delete help things? 

@roottootso iv had a good read through some of that and other threads about the DPF.

 

Iv never had any EML light come on or any engine/emmison warnings (accept the recent pressure sensor) in the 6 years iv had the car. 

 

I'll go to my local garage and get it plugged in and see if it will tell us what the levels are and if it needs to regen. 

 

Thanks again 

2 minutes ago, Peebs101 said:

I'll go to my local garage and get it plugged in and see if it will tell us what the levels are and if it needs to regen. 

If you have no warning lights up on the dash it should not need to do one.
 

2 hours ago, Peebs101 said:

@Urrell@roottoot thanks very much guys. I will look into that. 

 

Do you think he map I'm using could make the dpf to clog or is this just something  I need to do? 

 

Does an egr delete help things? 

 

It could well be that the map is producing more soot than standard and at 80k miles the DPF might have quite an ash load.  That could well be the cause of more frequent regens and the poorer fuel economy.

 

First thing I'd do would be to have the DPF levels read in VCDS and take it from there.  I wouldn't delete the EGR, especially on an EA288 engine which has a more complex emissions system than the earlier engines. 

Apart from anything else, it plays a role in DPF regens and removing it is likely to increase the soot and ash levels in the DPF.    

 

I have the same engine in my Yeti and it's been remapped by Angel Tuning for the past couple of years.  I can easily return mpg figures in the low 30's when I'm really hoofing it over Fife back roads which is quite often. 

Thanks @Urrell. I think I'll have a look at the throttle body for any gunk etc as was suggested. 

 

It also says people woth dpf issues can cause it run a bit stutterey in the low end, which mine also runs smooth. Even from 4th gear at idle revs

 

 

2 minutes ago, Schtum said:

 

It could well be that the map is producing more soot than standard and at 80k miles the DPF might have quite an ash load.  That could well be the cause of more frequent regens and the poorer fuel economy.

 

First thing I'd do would be to have the DPF levels read in VCDS and take it from there.  I wouldn't delete the EGR, especially on an EA288 engine which has a more complex emissions system than the earlier engines. 

Apart from anything else, it plays a role in DPF regens and removing it is likely to increase the soot and ash levels in the DPF.    

 

I have the same engine in my Yeti and it's been remapped by Angel Tuning for the past couple of years.  I can easily return mpg figures in the low 30's when I'm really hoofing it over Fife back roads which is quite often. 

Thanks @Schtum

 

You say Fife, I'm in Aberdeenshire 👍. Maybe passed each other on the roads. 

 

If I have a "spirited" mine come home closer to 20mpg. Where is Angel Tuning? And how much was your tune?

2 minutes ago, Peebs101 said:

Thanks @Schtum

 

You say Fife, I'm in Aberdeenshire 👍. Maybe passed each other on the roads. 

 

If I have a "spirited" mine come home closer to 20mpg. Where is Angel Tuning? And how much was your tune?

 

https://www.facebook.com/angeltuningscotland   Run by Paul Winston and his son out of Symington near Kilmarnock.  They're mobile and will come to you.  

 

I had my previous Mk5 Golf GT Sport 170 TDI remapped by Paul as well.  That made 210 bhp and 330 lbs-ft on a local dyno and returned 50 + mpg on a long run if I kept it below 100 mph. 

 

If I remember correctly, it was just under £300 for the Yeti.  Paul couldn't get a virtual unlock code for the ECU so he had to remove it from the car and map it on the bench in his van.  

7 minutes ago, Schtum said:

 

https://www.facebook.com/angeltuningscotland   Run by Paul Winston and his son out of Symington near Kilmarnock.  They're mobile and will come to you.  

 

I had my previous Mk5 Golf GT Sport 170 TDI remapped by Paul as well.  That made 210 bhp and 330 lbs-ft on a local dyno and returned 50 + mpg on a long run if I kept it below 100 mph. 

 

If I remember correctly, it was just under £300 for the Yeti.  Paul couldn't get a virtual unlock code for the ECU so he had to remove it from the car and map it on the bench in his van.  

Thanks again, will give them a call and see what they say.

I thought I'd give everyone an update on this.... 

 

On one of usual long runs yesterday I decided to give it a chance to regen. So I sat in 4th about 65ish 2800rpm ish for about 20 minutes to make sure.i had all ready been running for 20 mins and everything nice and warm by that point. 

 

By the end of the 20 mins I was getting 41.1mpg in 4th. On my way home the mpg went up to like 48mpg @ 74mpg which is pretty normal for me. 

 

Seems like the car is behaving again, wait and see if it wants a regen anytime soon. Still feels a little sluggish but @Schtumhas kindly offered me to race him and see if i can keep up 🤣🤣🤣. 

Edited 20 September, 20223 yr by Peebs101