Td5 using excessive fuel

Groutmanshaun · Mar 10, 2019

Hi all,
I have a 2003 td5 which is a truly great car and been pretty much faultless in the 2 years we've owned it. Recently though we have notice it seems to be using excessive amounts of fuel. I personally have noticed any marks or signs of a leak but the I don't drive it all that much the other half does. My question is are the any known issues to do with fuel g or with the fuel system that would result in either consuming the excessive diesel or dropping it from somewhere
Tia

dieseldog69 · Mar 10, 2019

Groutmanshaun said:
Hi all,
I have a 2003 td5 which is a truly great car and been pretty much faultless in the 2 years we've owned it. Recently though we have notice it seems to be using excessive amounts of fuel. I personally have noticed any marks or signs of a leak but the I don't drive it all that much the other half does. My question is are the any known issues to do with fuel g or with the fuel system that would result in either consuming the excessive diesel or dropping it from somewhere
Tia

Define excessive fuel consumption and how much has it varied and how have you gauged this?

Is it automatic or manual?

Are you at any kind of altitude?

Groutmanshaun · Mar 10, 2019

dieseldog69 said:
Define excessive fuel consumption and how much has it varied and how have you gauged this?

Is it automatic or manual?

Are you at any kind of altitude?

It's a manual and not at any altitude. Gauge purely by how often we're visiting the petrol station lol. No we are only getting about 70 miles out of £30

dieseldog69 · Mar 10, 2019

Groutmanshaun said:
It's a manual and not at any altitude. Gauge purely by how often we're visiting the petrol station lol. No we are only getting about 70 miles out of £30

Holy smokes, quick calcs says you're getting 13/14mpg

You sure it's still got a diesel engine in there not a new V8?

Something is wrong in there for sure, have you put any diagnostics on it to see as all the sensors are working properly?

Groutmanshaun · Mar 10, 2019

dieseldog69 said:
Holy smokes, quick calcs says you're getting 13/14mpg

You sure it's still got a diesel engine in there not a new V8?

Something is wrong in there for sure, have you put any diagnostics on it to see as all the sensors are working properly?

No not yet, Its only just really been brought to my attention as the missus uses it day to day. Could be getting a little more but I think we've worked out to be getting around 20 mile to the gallon. I don't know what they are suppose to do but we've definitely seen an increase in fuel consumption over the past weeks and her travelling doesn't change week to week

dieseldog69 · Mar 10, 2019

I'd be tempted to get the diagnostics on it to see what the live readings are, maybe it's over fuelling from an intake temp sensor or something similar.

Groutmanshaun · Mar 10, 2019

dieseldog69 said:
I'd be tempted to get the diagnostics on it to see what the live readings are, maybe it's over fuelling from an intake temp sensor or something similar.

OK cheers will get it plugged in through the week cheers

1988smithy · Mar 11, 2019

Check for high oil level on dipstick as matter of urgency.

Injector O rings can fail, dumping diesel into the engine. Engine can run on potentially, bad things happen.

Check oil level and sniff for diesel. It'll be thin as pìss as well.

Feathers McGraw · Mar 11, 2019

Fuel pressure regulator leaking.
Brakes sticking on.
Low range selected

.
Fuel filter leaking.

Dippypud · Mar 11, 2019

Someones nicking it ?

Not unheard of in Lunnen ... they pull the pipe off and drain the top down so you're only ever on half tank max ....

Groutmanshaun · Mar 11, 2019

Thanks everyone I'll check all these

kermit_rr · Mar 11, 2019

For such a difference in mpg, is have thought most of it would be coming out of the exhaust as smoke if it was a fuelling problem?

Groutmanshaun · Mar 11, 2019

kermit_rr said:
For such a difference in mpg, is have thought most of it would be coming out of the exhaust as smoke if it was a fuelling problem?

Yeah me too but it seems to run fine very little if any smoke. Just this issue where as it suddenly become even thirstier than normal

Si Click · Mar 11, 2019

How does it feel power wise? Are you having to use more throttle to achieve the same result?
If so, dodgy MAF or MAP sensor? Loss of boost between turbo and inlet manifold? Failing turbo?

Nig43 · Mar 11, 2019

Faulty fuel guage

JUKE179r · Mar 11, 2019

dieseldog69 said:
Holy smokes, quick calcs says you're getting 13/14mpg

That MPG is spot on for me V8.

Landmark2 · Mar 11, 2019

Make sure you check the rear of the chassis in front of the fuel tank for a leaking "green pipe" too.
Griff

Spot1 · Mar 13, 2019

I use an app called fuelly. Very good for tracking fuel use, the important bits of it are free to use.
To give you some idea, My 2004 TD5 D2 is currently averaging 22.2 MPG.
I'd notice straight away if my MPG went down due to this app.

Stanleysteamer · Mar 27, 2019

I suffered this for ages, checked MAF, changed it, checked MAP, cleaned it, etc etc, by chance a garage checked with its diagnostics. Despite the MAF being reasonably new, it WAS the MAF. Since replaced mpg has gone down and performance has gone up. td5 auto, managed to get 28.5 mpg while on holiday in Scotland. (Brim to brim test.) So I'd suggest having a really good look at your MAF. You could even try disconnecting it, if it is bad the "get you home" limp mode will probably be more economical!

berg450 · Mar 28, 2019

And not just good but genuine MAF! I have also changed MAF two times and finally only the genuine worked well. Better performance and fuel consuption

Td5 using excessive fuel

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