Lousy MPG 2.0hdi C4 Picasso
Lousy MPG 2.0hdi C4 Picasso
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Discussion

jvr

Original Poster:

789 posts

277 months

Saturday 17th January 2015
quotequote all
A very PH question here but my other car is a 996 so not all bad..but..
my C4 Picasso has got chronic MPG , according to book and our other Citroen as a benchmark it should do at least 45 overall.
Driving like a granny i'm getting 35,i've changed air filter, which was dirty and the Maf,still the same MPG though. Car runs fine with no issues or smoke.

Any ideas,i'm scratching my head!
Cheers
P

Joe5y

1,638 posts

213 months

Saturday 17th January 2015
quotequote all
Certainly sounds as if something is up. I've got a Berlingo work-horse with the 2.0HDi and 140000 miles on it; I do a mix of journey's including towing fairly often and see 42-44mpg on average.

Road2Ruin

6,531 posts

246 months

Saturday 17th January 2015
quotequote all
Mpg is very dependent on road type, traffic density, weather and I hate to say it driving style. My wife struggles to get 37 mpg out of her astra...I get 45!

S0 What

3,358 posts

202 months

Saturday 17th January 2015
quotequote all
Diesels are allways worse in cold weather? could be it?
MAF is usuall fav on these, it will only throw up an MIL if the readings are outside the a set perameter, they can read wrong and still be in spec but first thing i would try is the ECU temp sender.

Kitchski

6,551 posts

261 months

Saturday 17th January 2015
quotequote all
We've got the old HDi and it's pretty solid with 45-55 the norm, but I've seen a lot of the newer 16v models struggling at high 30's. The 2.2 is even worse!

Not sure what they've done to them. I imagine when they're a1 then they get nearer the book figures, but so many aren't by now!

bearman68

4,941 posts

162 months

Saturday 17th January 2015
quotequote all
Kitchski said:
We've got the old HDi and it's pretty solid with 45-55 the norm, but I've seen a lot of the newer 16v models struggling at high 30's. The 2.2 is even worse!

Not sure what they've done to them. I imagine when they're a1 then they get nearer the book figures, but so many aren't by now!
Enhanced EGR, and DPF. DPF uses fuel to burn off soot. Take it all off I say......

Davie_GLA

6,888 posts

229 months

Saturday 17th January 2015
quotequote all
I've got a 407 with the 2.0HDi engine and am struggling to see 38mpg. I could have something far more interesting with that sort of economy.

I do get the 'depolution system faulty' error a lot so guess something needs cleaned out. EGR? Dunno.


jvr

Original Poster:

789 posts

277 months

Saturday 17th January 2015
quotequote all
Its strange because there are no other apparent problems that I can see and its only done 37000 miles and no fault codes show up on my pad app via the OBD but that may not be accurate?

rallycross

13,757 posts

267 months

Saturday 17th January 2015
quotequote all
We had a 2003 hdi 110 bhp manual version and on the motorway on cruise it would only do mid 30's mpg at 75 mph but at 60 mph was showing something Amazing like 55 mpg I think the big frontal area and low power combined to give very poor motorway economy.

Welshbeef

49,633 posts

228 months

Saturday 17th January 2015
quotequote all
Change the fuel filter too - makes a big difference if old.

Make sure you do give it a proper Italian time up to clear the soot too.
Also you should use Wynns fuel tank cleaner (gets rid of all the moisture built up over the years and then the fuel injector treatment you may have one or more injectors not giving a fine spray of fuel instead dripping or on the way to dripping means a less efficient burn so lower MPG.
This is cheap to try and all it can do is improve the engine.



Tyre pressure is another one to kill MPG if too low. Likewise are you carrying round a boot full of stuff weight you don't need to carry.
Do you have roof rails or a roof box and leave it on
What sort of driving - do you go for >30 miles every drive or is it more 2-4 miles.

jhonn

1,707 posts

179 months

Saturday 17th January 2015
quotequote all
^^^ Good advice above; also check that none of your wheels are binding. Calipers and pistons can get sticky at this time of year - it doesn't take much drag to affect your mpg.

Have a look at your front tyres for uneven wear (scrubbing) - if so get your tracking checked.

Oh, and one other thing - if you're using supermarket fuel try changing to Shell/Esso/etc - in my experience they burn more efficiently and will give you an extra couple mpg.

Edited by jhonn on Saturday 17th January 20:48

jvr

Original Poster:

789 posts

277 months

Saturday 17th January 2015
quotequote all
Yeah the air filter wasn't changed on previous services(done now) so fuel filter will not have done either so i'll get that changed, put some injector cleaner in and then give it a little drive...

MG CHRIS

9,322 posts

197 months

Saturday 17th January 2015
quotequote all
37000 miles how old is the car. What journey type guessing at that mileage not many motorway miles so not really need for the type of journey.

jvr

Original Poster:

789 posts

277 months

Saturday 17th January 2015
quotequote all
MG CHRIS said:
37000 miles how old is the car. What journey type guessing at that mileage not many motorway miles so not really need for the type of journey.
6 years old but the guy lived in east Kent and had a place in France as some of the receipts were from France so I assume some long journeys as well

jvr

Original Poster:

789 posts

277 months

Sunday 18th January 2015
quotequote all
Thanks guys for your inputs.
P

carmadgaz

3,204 posts

213 months

Sunday 18th January 2015
quotequote all
Use makes one hell of a difference. When I'm using the MX-5 for my tiny commute (1.5 miles 4x a day) I get about 90 miles to a half tank. Fill 'er up and do a trip to my girlfriend in Aberystwyth and I can get 170 miles to a half tank.

kdri155

644 posts

181 months

Sunday 18th January 2015
quotequote all
I have a 54 plate Picasso 2.0HDI I use as a taxi on stop/start driving doing around 100-140 miles a day I get 42.8mpg after some maths, although the cars computer shows 44.7mpg.

It is regularly serviced with all filters and oil changed every 4 months, I also use injector cleaner and never fill up with supermarket fuel on Shell.

Welshbeef

49,633 posts

228 months

Sunday 18th January 2015
quotequote all
kdri155 said:
I have a 54 plate Picasso 2.0HDI I use as a taxi on stop/start driving doing around 100-140 miles a day I get 42.8mpg after some maths, although the cars computer shows 44.7mpg.

It is regularly serviced with all filters and oil changed every 4 months, I also use injector cleaner and never fill up with supermarket fuel on Shell.
Every 4 months! Overkill?

rambo19

2,967 posts

167 months

Sunday 18th January 2015
quotequote all
Welshbeef said:
kdri155 said:
I have a 54 plate Picasso 2.0HDI I use as a taxi on stop/start driving doing around 100-140 miles a day I get 42.8mpg after some maths, although the cars computer shows 44.7mpg.

It is regularly serviced with all filters and oil changed every 4 months, I also use injector cleaner and never fill up with supermarket fuel on Shell.
Every 4 months! Overkill?
Nope, common sense.

mondeoman

11,430 posts

296 months

Sunday 18th January 2015
quotequote all
rambo19 said:
Welshbeef said:
kdri155 said:
I have a 54 plate Picasso 2.0HDI I use as a taxi on stop/start driving doing around 100-140 miles a day I get 42.8mpg after some maths, although the cars computer shows 44.7mpg.

It is regularly serviced with all filters and oil changed every 4 months, I also use injector cleaner and never fill up with supermarket fuel on Shell.
Every 4 months! Overkill?
Nope, common sense.
Thats every 16000 miles, give or take a bit.