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Diesel Fiesta Fuel Consumption Isnt Right


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#16 xBR4DLEY

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Posted 20 January 2011 - 08:37 PM

Yeah was gonna say probably something clogged , is it only sluggish up to turbo or what?

#17 charie t

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Posted 20 January 2011 - 09:22 PM

This problem hasn't come around since they bumped the fuel prices up, by any chance?

#18 samsfern

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Posted 20 January 2011 - 09:30 PM

This problem hasn't come around since they bumped the fuel prices up, by any chance?


no, i looked to see how many litres id put in when i last filled it.

#19 998dave

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Posted 20 January 2011 - 09:33 PM

but alot of fuel lately is proper crap and what it says on ur Fuel cap is RUBBISH! use what fuel you think and like, they put that on so they get money from it only reason big fuel companys pay to get it put on there cars! just one big scam :)

if i remeber rightly if it is the Endura engine they like messing EGR valves up aswell! like to make them stick on a bit so it under powers the car!


A 56 plate Diesel Fiesta will be badged as Duratorq, but assuming it's a 1.6 it's the DV6A Stg.IV engine.

any odd noises coming from the car recently, cyclonic turbo noises etc have a look if you can block off the EGR valve.

You can't block the EGR valve, it's part of the exhaust manifold pre-turbine.

problem is, the damn things so quiet inside, i can hardly hear the engine. Whats an egr valve? Ill have a look over what piping i can see tommorow, thanks.


Exhaust Gas Recirculation, but we've covered that, basically reinjects some exhaust gas into the intake stream to help improve emissions.


Now you don't have a DPF on that age car, so can't be that blocking.
I'd be looking at the intake manifold, and MAF.

There's plenty of places that'll do a diagnostic on your car fairly cheaply to see what fault codes you have, they should then be able to decode these, and tell you if anythings up.

Dave

#20 Tommyboy12

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Posted 20 January 2011 - 09:43 PM

Your easiest and best bet is to ring up Ford and have them plug it into a computer. If they are nice they will do it for free. If not it usually costs between £20-35. Its much easier than chasing round all your sensors. The computer will tell you instantly and then bish bash bosh. New sensor and your away.

#21 samsfern

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Posted 20 January 2011 - 09:56 PM

but alot of fuel lately is proper crap and what it says on ur Fuel cap is RUBBISH! use what fuel you think and like, they put that on so they get money from it only reason big fuel companys pay to get it put on there cars! just one big scam :)

if i remeber rightly if it is the Endura engine they like messing EGR valves up aswell! like to make them stick on a bit so it under powers the car!


A 56 plate Diesel Fiesta will be badged as Duratorq, but assuming it's a 1.6 it's the DV6A Stg.IV engine.

any odd noises coming from the car recently, cyclonic turbo noises etc have a look if you can block off the EGR valve.

You can't block the EGR valve, it's part of the exhaust manifold pre-turbine.

problem is, the damn things so quiet inside, i can hardly hear the engine. Whats an egr valve? Ill have a look over what piping i can see tommorow, thanks.


Exhaust Gas Recirculation, but we've covered that, basically reinjects some exhaust gas into the intake stream to help improve emissions.


Now you don't have a DPF on that age car, so can't be that blocking.
I'd be looking at the intake manifold, and MAF.

There's plenty of places that'll do a diagnostic on your car fairly cheaply to see what fault codes you have, they should then be able to decode these, and tell you if anythings up.

Dave


its a 1.4 tdci, thanks for that, ill take it for a diagnostic monday then.

#22 and90cooper

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Posted 22 January 2011 - 09:23 PM

i have an 06 tdci fiesta van which is extremely good on fuel (60 odd mpg) but these common rail injection ford engines are well known for having injector seal problems-there will be a fuel odour in the car and it will make a bit of a chuffing sound on tickover (and be down on power and use lots of diesel).and if the injectors themselves need changing they all have to be programmed with a laptop=big bucks.
ive been lucky with mine as i think this was all done before i bought it.
and dont take it to ford as their technicians arent too clued up on them- try an independant puegot or citroen place as they all share the same engine.
and dont EVER run it out of diesel as this can ruin the injector pump.
have a look on some of the ford forums.hope this helps.
andrew.

#23 samsfern

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Posted 22 January 2011 - 09:56 PM

luckily when we bought the car, it came with some warranty package, so gave them a call, its booked in for a diagnostic at a halfords autocentre. Ill tell you what the results are.

#24 998dave

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Posted 23 January 2011 - 11:11 AM

its a 1.4 tdci, thanks for that, ill take it for a diagnostic monday then.


Makes it the DV4A Diesel engine.
Outwardly the same engine as the 1.6 so all the above still applies.

#25 998dave

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Posted 23 January 2011 - 11:14 AM

if the injectors themselves need changing they all have to be programmed with a laptop=big bucks.


All injectors have a code on them to do with their internal valve timing, it's to make sure you get even and controlled combustion.
The codes are for the injection quantities when new, but the PCM does addapt to injector wear over time.

If you don't code them when the engines new then there's a default, the problem is that the 06 Fiesta will have adapted to one set of injectors, and will now be changing...

Shouldnt cost that much, it's just four sets of numbers into the PCM.

D

#26 samsfern

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Posted 04 February 2011 - 07:36 PM

well, took it to this halfords auto centre place, they plugged a laptop in, and went for a drive, whilst the car was left with them for the day, got a phone call, saying that its injector seals leaking and reckon theres fuel sitting on top of the engine? Am i right in thinking to myself, if it was leaking, itd be dripping onto the floor, as it doesnt leave any drips on the floor, or would it only be leaing badly under load? They quoted us just shy of £280 to do them using genuine ford parts, sound about right? Also, how hard a job are they to do, as i may have an attempt myself, after all, i am a qualified mechanic, done my apprenticeship and what not, but as i say, i only work with classic cars, so have fairly limited knowledge when it comes to modern cars. Many thanks.

Edited by samsfern, 04 February 2011 - 07:37 PM.


#27 xBR4DLEY

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Posted 04 February 2011 - 07:53 PM

well, took it to this halfords auto centre place, they plugged a laptop in, and went for a drive, whilst the car was left with them for the day, got a phone call, saying that its injector seals leaking and reckon theres fuel sitting on top of the engine? Am i right in thinking to myself, if it was leaking, itd be dripping onto the floor, as it doesnt leave any drips on the floor, or would it only be leaing badly under load? They quoted us just shy of £280 to do them using genuine ford parts, sound about right? Also, how hard a job are they to do, as i may have an attempt myself, after all, i am a qualified mechanic, done my apprenticeship and what not, but as i say, i only work with classic cars, so have fairly limited knowledge when it comes to modern cars. Many thanks.


There was a car at work that had leaked diesel everywhere because of injectors failing , really dirty. I dont think you would see it drip to the floor , as its quite gunky and just sticks around the injectors and on the head etc. You probably could fix it yourself , but you dont have all the computers if anything needs re-doing etc.

#28 Sam14

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Posted 04 February 2011 - 08:19 PM

Sam,

I have a 55 plate Unleaded Fiesta and i have notice the change in fuel consumption

Also my exhaust pops on down revs, pops like the Focus ST. Took it to ford they did all the test and it came out fine, check the baffles were still okay but there all fine.

I get the smell of petrol when i start it up every morning

Had the sparks, oil and filter cleaned over a 1000 miles ago, when i first got it, it had AMAZING fuel consumption but now i just seems to EAT IT

put £15 in, got 4 Bar on the fuel gauge and then did about 10 miles and one bar went down

Have you noticed at some of the bar on the fuel gauge last longer than the others? haha

#29 valve bounce

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Posted 04 February 2011 - 08:21 PM

i would say aslong as you dont need to replace the injectors then yes you could do it your self, it reasnably easy just remove every thing around the injectors then scrape and hover all the rubbish build up off around the injectors. then remove the injector pipe from the injecton and from the pump make sure you hold the nut looking bit on the injector and pump whilst you crack the pipe lose. after that undo the injector clamp and remove the injector and make sure the washer bit comes out aswell. as for rebuild clean all parts with desiel and a cloth and slide the injector back in and tighten the clamp up. new injector pipes MUST be used and be tourqued up to 25nm using a crows foot socket thing and again make sure you hold the nut bit on the injector and the pump if this turns then it will need replcing. i will try to download the peougeot repair procudor for you as its a peougeot engine.

rob

#30 998dave

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Posted 05 February 2011 - 04:53 PM

well, took it to this halfords auto centre place, they plugged a laptop in, and went for a drive, whilst the car was left with them for the day, got a phone call, saying that its injector seals leaking and reckon theres fuel sitting on top of the engine? Am i right in thinking to myself, if it was leaking, itd be dripping onto the floor, as it doesnt leave any drips on the floor, or would it only be leaing badly under load? They quoted us just shy of £280 to do them using genuine ford parts, sound about right? Also, how hard a job are they to do, as i may have an attempt myself, after all, i am a qualified mechanic, done my apprenticeship and what not, but as i say, i only work with classic cars, so have fairly limited knowledge when it comes to modern cars. Many thanks.


The fuel injecton system needs to be kept spotlessly clean, and the injector codes need putting into the PCM. I'd let a specialist do it.

Valve Bounce is correct, it's a PSA / Ford engine, (Gemini shared technology program), so a Peugeot / Citroen dealer may also be willing to look at it for you.




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