Citroen DS4 Forums banner
1 - 16 of 16 Posts

·
Registered
Joined
·
20 Posts
Discussion Starter · #1 ·
Hi all, im having issue's with my fuel comsumption, when first got this car i was getting 55mpg and now im get 37.9 mpg i dont hammer my car and drive it softy, and the last 2 months i have noticed the fuel consumption going down and down, can anyone help with ideas, i have asked citroen and as normal no defo answer. they have put it down to cold weather which i think is silly.
 

·
Registered
Joined
·
472 Posts
The cold will affect the consumption a little bit, the cold starts keep a rich mixture longer but what will cause more fuel consumption is the type of fuel, ie supermarket or main petrol station although 55 down to 37 is a massive drop take it you have a diesel. I get about 38 out of my petrol I don't hammer it much but don't take it easy either
 

·
Registered
Joined
·
20 Posts
Discussion Starter · #3 ·
hi Derek,

yes its a diesal, the worst thing which i dont understand is that i go to the same petrol station use the same fuel and thats been from day one since i got the car. but the weirdest thing about it is, just thinking about it is that there was an update for the bluetooth and since then i have noticed it, but when i spoke to the garage about it they told me they use a different port to do the update.


running out of ideas, i understand you would use a little bit in the cold weather but not the excess amounts im using now, and my driving style hasnt changed its still the same old drive and its the same roads i go on day in day out.
 

·
Registered
Joined
·
472 Posts
It could be the update adjusted the trip computer, try topping it off them do a tankful of fuel and top it off again the do the sums to check the trip computer
 

·
Registered
Joined
·
13 Posts
Have no answer to your problem (tyre pressure??) but my 1.6HDi has read 47.8 MPG at every refuel I remember, done just over 12,500 miles since April. Service on Friday so will ask but don't expect a positive answer.
 

·
Registered
Joined
·
227 Posts
Andini said:
Have no answer to your problem (tyre pressure??) but my 1.6HDi has read 47.8 MPG at every refuel I remember, done just over 12,500 miles since April. Service on Friday so will ask but don't expect a positive answer.

I use Trip #1 for the total since I had the car, and I reset Trip #2 before I do a longish journey just out of curiosity.

Trip #1 is pretty well stuck on 51.3 (I think it is), and trip #2 moves around for the first 20-30 miles but within 50 or so miles is the same as trip #1 (51.3)

seems like it doesn't matter how you drive, the economy is pretty static
 

·
Registered
Joined
·
227 Posts
kazman said:
hi Derek,

yes its a diesal, the worst thing which i dont understand is that i go to the same petrol station use the same fuel and thats been from day one since i got the car. but the weirdest thing about it is, just thinking about it is that there was an update for the bluetooth and since then i have noticed it, but when i spoke to the garage about it they told me they use a different port to do the update.


running out of ideas, i understand you would use a little bit in the cold weather but not the excess amounts im using now, and my driving style hasnt changed its still the same old drive and its the same roads i go on day in day out.




does your car have a DPF? (I am sure it would).

if so, maybe it is getting blocked up? does your regular journey involve any high speed (60MPH+) runs for any significant length of time? you may need to take the car for a bit of a blast to 'clear it's throat' ?
 

·
Registered
Joined
·
268 Posts
Like Hoovie says these engines need to work to keep sweet, mine gets very sluggish when its not been on a decent run, by which I mean prolonged pulling at speed. Have not checked the fuel consumption difference mine seems to hover arround the 40-45 mark.
 

·
Registered
Joined
·
578 Posts
Mines done just over 16000 mile sand Im now averaging 47.8 (2.0HDi). I use it around town but it gets regular motorway driving at speed - - - as GazzDs says these cars need to be driven especially through the gears :))
 

·
Registered
Joined
·
6 Posts
Holy thread resurrection Batman.

On a recent trip to France, circa 1000 miles round trip at a pretty steady pace (cruise on all the way there and back) between 60 and 80mph ours (2.0 DStyle 160) returned about 38mpg both for the whole trip (Trip 1) and very similar for each of the 2 1/3 tanks (Trip 2). I guess it was windy and it could be said that the car was loaded up with spare wheel (proper) two suitcases, double-buggy and xmas presents but considering that two of the three passengers weigh 25kg between them overall I wouldn't say that it was more than carrying four adults.


What do I check first? My old DW10 in my 206 HDi used to drop off noticeably when the fuel filter got old and perk back up on replacement. Anything daft like this?


Cheers in advance, Jim
 

·
Registered
Joined
·
492 Posts
As posted elsewhere, I'd be checking the EGR system first, as long as your ""handy""�.
If it's gummed up then your particulate filter is also likely to be ineffective. Do you notice the car being a little more smoky ? You'd probably need to be watching from a car following to really notice.
Buy a can of EGR cleaner and spray it into the turbo intake, following the directions or google it.
Of course a removal and clean would be more effective but it'll also take a lot longer. Edited by: Nicdog
 

·
Registered
Joined
·
6 Posts
Second thread resurrection from me, I'm afraid.

I've been looking into this a bit more over the last couple of months. I've had a live diagnostic on it and three of the four injectors are overfuelling basically as much as they can. They've been removed, cleaned and checked on a test-bed and there's nothing wrong with the injectors themselves so something's telling them to overfuel for some reason.

I'm guessing next move is having someone do a rolling-road remap to see why it's overfuelling and maybe get it to run a bit more sensibly. Any recommendations if anybody's had anything done to their DW10?

Cheers, Jim
 

·
Super Moderator
Joined
·
1,056 Posts
I'm not quite sure how citroen decide how much fuel to put in for a diesel, on a petrol then you'd be looking at coolant temp sensor, lambda and airflow sensors to cause significant fuel rise.


Could the turbo have an issue? no boost and more fuel just to keep where you were. The 1.6 turbos were known to be weak.
 

·
Registered
Joined
·
6 Posts
One or two of the brake calipers are a bit sticky but not outrageously so. I'll do them as well but it's just thrown an EML and Engine Fault message (nice and specific). Closer inspection revealed codes P0487 and P2562 which were apparently due to a pipe having come adrift of the throttle body. The other end is attached to the EGR. Question is, is it the pipe that's faulty or the Throttle Body. I guess I start with the pipe, since it's cheaper.

I'm hoping that this has been causing the fuelling issues all along but I somewhat doubt it.

Cheers, Jim
 

Attachments

·
Registered
Joined
·
212 Posts
I've had two DS4's. 1.6HDi with egs box, average 64.6 mpg. The current one is a 180 bhp 2.0hdi with EAT 6 box. About 46mpg winter normal driving and about 49 mpg summer but 75 ish mph motorway cruise devon to Cumbria wass about 55 mpg 2 weeks ago. My previous C4 1.6hdi with EGS usually managed high 60's. Ok - mine is fine but if it were to drop to the low fuel consumptions mentioned I would take it to a diesel specialist not a Citroen/DS dealer. They will have much more expertise on solving these issues rather than the main dealer idea of lets try replacing this, and if it doesn't work lets try this.. and then that etc - and all at your expense.
 
1 - 16 of 16 Posts
Top