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FF Mk4 2020 ecoblue BIG DIESEL ISSUE!

Featured Replies

If like me you bought this particular terror of a car, you may find it a bit of a burden. 
Constant jerking, regular engine issue light coming on. All because of cheap diesel. 
 

How to fix!
1. Use Supreme Texaco diesel! £0.14/ltr more. 
in my case the only nearest garage that sells it is 44miles away. 
2. Delete it. (Illegal)

3. Sell car… lose £10000 on resale!

4. Lump it blow up engine and scrap it! 
Probably the best option!

5. Crash it and cash in on insurance! 
Are you serious? 
6. Walk away and give up! 
 

What is wrong with Ford putting out such a stupid car! I should sue! 
Worthless piece of Ford stupidity! 



How do you know it's just because of cheap diesel?

Not everyone on here, with a 2.0 Ecoblue, is having the same issue.

You need to find out what exactly is causing your fault.

Don't use Super Diesel it's too expensive, use regular Esso or BP and add Archoil AR6900-D Max

https://www.ebay.co.uk/itm/371680538135

It works out much cheaper than super and actually has Cetane booster in

But please get the car checked for the issue.

If you're only doing short journeys and are causing DPF issues make sure you change the oil every 6k minimum as the wet belt will let you down

14 minutes ago, DaveT70 said:

If you're only doing short journeys and are causing DPF issues make sure you change the oil every 6k minimum as the wet belt will let you down

No wetbelt.  It's a 1.5.

20 minutes ago, TomsFocus said:

No wetbelt.  It's a 1.5.

Where does it say that??

15 minutes ago, DaveT70 said:

Where does it say that??

The OP has been moaning about it for weeks. :whistling:

8 hours ago, ProfitMouse said:

If like me you bought this particular terror of a car, you may find it a bit of a burden. 
Constant jerking, regular engine issue light coming on. All because of cheap diesel. 
 

How to fix!
1. Use Supreme Texaco diesel! £0.14/ltr more. 
in my case the only nearest garage that sells it is 44miles away. 
2. Delete it. (Illegal)

3. Sell car… lose £10000 on resale!

4. Lump it blow up engine and scrap it! 
Probably the best option!

5. Crash it and cash in on insurance! 
Are you serious? 
6. Walk away and give up! 
 

What is wrong with Ford putting out such a stupid car! I should sue! 
Worthless piece of Ford stupidity! 

modern UK fuels are a sick joke - I always bought Esso and Shell for my father's old E class tractor - of late its been dropping to 23mpg round town and 37 on a run....

then two weeks ago I bought BP posh diesel and the consumption changed immediately - round town jumped to 32mpg and I got 46.9mpg on a 70 mile run I have done 30 or 40 times over 10 years and never managed to see more than 44 before - and on the std rubbish of late (since they reformulated all UK fuels in line with rip off E10) it wouldn't go above 39 mpg in the last two years

and as for costco - that stuff its even worse... cheap as chips coz it works much like water......  all vehicles I have tried that junk on the consumption is horrific - don't touch the stuff now

Just now, TomsFocus said:

The OP has been moaning about it for weeks. :whistling:

Ah, OK

 

10 minutes ago, Botus said:

modern UK fuels are a sick joke - I always bought Esso and Shell for my father's old E class tractor - of late its been dropping to 23mpg round town and 37 on a run....

then two weeks ago I bought BP posh diesel and the consumption changed immediately - round town jumped to 32mpg and I got 46.9mpg on a 70 mile run I have done 30 or 40 times over 10 years and never managed to see more than 44 before - and on the std rubbish of late (since they reformulated all UK fuels in line with rip off E10) it wouldn't go above 39 mpg in the last two years

and as for costco - that stuff its even worse... cheap as chips coz it works much like water......  all vehicles I have tried that junk on the consumption is horrific - don't touch the stuff now

I think things may have moved on a bit.

Diesel doesn't have E5 or E10

My 2.0 Diesel BMW is doing around 58 MPG average on normal Esso diesel

Super Diesel does not have Cetane boosters in any more, just extra lubrication

Costco is Super Diesel at regular Diesel price or cheaper

And if it is a 1.5 then it isn't anything to do with the fuel at all my 2019 1.5 Ecoblue only ran on Sainsbury's, ran like a dream doing 58-60 MPG average and never spluttered once.

Just everything else fell to bits, the engine was sound

Take it somewhere that can rectify the obvious fault

I thought I was the only one using this stuff...
I'm just echoing the use of Archoil to get premium diesel at half the price differential.
I notice no measurable difference in economy.
I feel it runs smoother and (hopefully) has the insurance of extra lubrication for the fuel pump that I don't want to fail and some recognised detergent that may, or not, be keeping things clean.
The cetane improver is probably the reason for improved smoothness.
As usual, you pays yer money...

Mine has risen slightly, but that could be the placebo effect.

Definitely quieter, definitely smoother and more responsive. Starts quicker too! (Stop/Start is deactivated on mine though)

Much less regens also.

Really good stuff

On 5/9/2025 at 10:49 AM, DaveT70 said:

Ah, OK

 

I think things may have moved on a bit.

Diesel doesn't have E5 or E10

My 2.0 Diesel BMW is doing around 58 MPG average on normal Esso diesel

Super Diesel does not have Cetane boosters in any more, just extra lubrication

Costco is Super Diesel at regular Diesel price or cheaper

of course - the point was since we introduced E10, ALL UK fuels (petrol and tractor fuel) were adjusted to become mostly crap - tractors have what they call B7 - I just checked BP site they claim 375 miles more per year on the Posh stuff based on 6.4k mile usage 

Its funny you mention the two no longer have a cetane difference - I deliberately put the std BP tractor fuel in last fill and I've done three long trips using it in the last week - and the MPG benefits I got on their posh stuff are still there on their std stuff vs the junk you get from Esso and Shell

 

I forgot to add

gave up Costco petrol 2 years ago 25% worse MPG on any petrol car or motorbike I use
gave up using Esso or Shell in any car or bike I use more than a year ago - as it runs like crap and drinks fuel faster than I can fill the tank
put BP in her Focus and even she notices it runs much better - their fuels still smell like petrol - whereas the rest are peddling something else

  • Author
On 5/9/2025 at 10:49 AM, DaveT70 said:

Ah, OK

 

I think things may have moved on a bit.

Costco is Super Diesel at regular Diesel price or cheaper

Maybe but Costco Chester is where I have been getting most of my diesel. Tried some Super diesel from Porthmadog £1.64.9. Drove home 22 miles much smoother so far. 
 

on the other note of fuel economy, When I purchased car 19 months ago it said 54.2 to a gallon. Since then it’s never moved from 52.1.

Used Texaco Supreme £1.43.9 for a month (slight jerking) and no change to per gallon. 
Wish I had an old Nissan cherry. Back and forth to London from Merthyr for £7. Them were the days for motoring. 106mph all the way! 

  • 4 weeks later...
  • Author

5 tanks of Esso V Power + 2 diesel fuel cleaners didn't have any effect except the extra 0.39p per litre and the diesel fuel cleaners at £5. 
 

no change except slightly smoother running and 0.6miles per gallon more. 
 

Still the issue exists. 
My own experience leads me to believe its the choke sticking. 
 

Petrols haven't had a choke since the 90's.  Diesels never had them.

8 hours ago, TomsFocus said:

Petrols haven't had a choke since the 90's.  Diesels never had them.

Think you need to explain what a choke is for our younger readers, those under 50 🤣

Perhaps a new set of spark plugs would help 😉

36 minutes ago, unofix said:

Think you need to explain what a choke is for our younger readers, those under 50

I was going to repeat the old story, that it's for ladies (and some gents nowadays) to hang their handbags, but thought I'd better not.

However, now you've got me trying to remember the last car we had with a choke - I think it was my wife's 1986 1.3 Astra. We went diesel for years after that and by the time we reverted to petrol, chokes were long gone.

For anyone that genuinely doesn't know, chokes were only needed on carburetors.

A carb provides a fixed air/fuel ratio all the time, which is what petrol needs for the most efficient burn. But some of that fuel gets lost on a cold engine (condenses on cylinder walls) so the AFR is too weak by the time the spark fires. 

Obvious solution is to add more fuel, but there's no way to do that with a carb.  So the opposite has to be done instead, inlet air has to be reduced.  This is done with a second butterfly valve that partially closes the inlet.  It literally 'chokes' the inlet.  (Think Homer & Bart Simpson).

I have no idea why it was given such an aggressive name though.  Inlet restrictor would've worked fine.  Perhaps the inventor was into bondage?

 

Chokes aren't needed with electronic injection.  The ECU simply opens the injectors for a longer time so that more fuel gets injected per cycle.

 

And chokes were never needed on diesels because they always take a full cylinder of air.  Only the fuel amount is changed with those, the AFR is constantly variable.  Diesel always has to be injected for this reason.  They never had carbs.  

Sorry to hijack the post, but with the Archoil is this on every fill or every so often?

I'm still having a few issues with the DPF on mine. Did a long round trip journey for work last Friday and after only a few short trips the car is already saying the DPF is overloaded.

Currently on track to get the oil changed every 6-8k, not big deal really, just the DPF error is ***** me off.

Will definitely run a container of the Archoil through the system first though.

1 hour ago, TomsFocus said:

I have no idea why it was given such an aggressive name though. 

The same term is used on firearms, especially shotguns, for a restriction of the bore before the muzzle, so there's a possibility. The term "shooting brake" also has origins in the shooting world.

Better not pursue your other suggestion!😀

9 hours ago, Passman86 said:

Sorry to hijack the post, but with the Archoil is this on every fill or every so often?

Every fill, plus decent quality diesel, NOT Super Diesel.

I find Esso very good

1ml per litre of diesel in tank added BEFORE you fill

13 hours ago, TomsFocus said:

I have no idea why it was given such an aggressive name

In the past I've also seen them described as "stranglers" which is possibly even more aggressive :smile:

2 minutes ago, mjt said:

In the past I've also seen them described as "stranglers" which is possibly even more aggressive :smile:

Sounds a little better in a romance language to match with carburettor & venturi.  'Soffocamento'. 🤔

3 minutes ago, TomsFocus said:

Sounds a little better in a romance language

Yep, most things do. "Quattroporte" sounds so much better than "four door".😀

10 minutes ago, Eric Bloodaxe said:

Yep, most things do. "Quattroporte" sounds so much better than "four door".😀

Ford Party.  Vauxhall Track.  Citroen Two Horses. :laugh: 

I used to use Miller's in my diesels and was always happy with it. Unlikely to get another diesel now, but out of curiosity I wonder how it compared with Archoil. Anyone used both?

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