Mondeo TDCI Poor MPG - Stumped!
30-03-2012, 08:14 PM
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Mondeo TDCI Poor MPG - Stumped!
Hi guys
Ive recently bought an 04 plate Mondeo 2.0 TDCI 115 with 113k on the clock, that's averaging 30mpg. That seems ridiculously low to me so...
I've had the injectors professionally replaced
I've replaced the EGR valve and cleaned the inlet manifold, replaced the fuel filter, and air filter
The air filter to turbo hose was split - I've replaced it
The EGR to inter cooler hose was split - I've replaced that too
But it's all made very little difference and now I'm stuck for ideas. Can anyone suggest anything I may have missed?? I'm beginning to think it may be something electrical but is there anything mechanical I should check?
Cheers
Ive recently bought an 04 plate Mondeo 2.0 TDCI 115 with 113k on the clock, that's averaging 30mpg. That seems ridiculously low to me so...
I've had the injectors professionally replaced
I've replaced the EGR valve and cleaned the inlet manifold, replaced the fuel filter, and air filter
The air filter to turbo hose was split - I've replaced it
The EGR to inter cooler hose was split - I've replaced that too
But it's all made very little difference and now I'm stuck for ideas. Can anyone suggest anything I may have missed?? I'm beginning to think it may be something electrical but is there anything mechanical I should check?
Cheers
30-03-2012, 08:35 PM
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town use or motorway i found mine going to read 40mpg town but back up to 56 motorway so drive on keep the revs over 1.7k seems to be best range !
30-03-2012, 08:56 PM
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Probably about 75/25 town driving but surely this engine should be averaging more than 30mpg even if it were completely round town?
It seems to have a slight stutter around 1500 - 1700rpm but only in 3rd/4th... Very confusing!
It seems to have a slight stutter around 1500 - 1700rpm but only in 3rd/4th... Very confusing!
31-03-2012, 06:30 PM
#6
st170 breaking
how much to fill up?
i know its different but my tranny get sabout 500 miles to 75 ltrs which i beleve is about 35mpg (fuel card printout)
my old superb would get 50+ mpg in pretty much any driving wether it was 100mph a roads or shop to shop on a saturday and is my laiden tranny can do 35mpg with the boot usually down and ladders on the roof there deffo summet up with yours
i know its different but my tranny get sabout 500 miles to 75 ltrs which i beleve is about 35mpg (fuel card printout)
my old superb would get 50+ mpg in pretty much any driving wether it was 100mph a roads or shop to shop on a saturday and is my laiden tranny can do 35mpg with the boot usually down and ladders on the roof there deffo summet up with yours
31-03-2012, 06:42 PM
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It's a 60 litre tank in the Mondeo I believe... Gets around 395 miles from full to fumes. Apparently that works out just shy of 31mpg on average. Parkers says it should reach about 38mpg combined.
I've tried just about everything I can find via google regarding excess fuel consumption on this engine so just wondering if anyone can suggest anything else or if my expectations are too high
I've tried just about everything I can find via google regarding excess fuel consumption on this engine so just wondering if anyone can suggest anything else or if my expectations are too high
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03-04-2012, 07:52 PM
#10
It should feel quite 'punchy'. Even the 115 goes well, as it's a torquey engine. You've obviously got issues somewhere. Probably wisest to go through the simple things first.
When was the air filter last changed? Or the fuel filter?
Have you got any fault codes coming up?
Has it always felt this way?
Does it make any odd 'whooshing' noises?
What condition are the boost pipes in?
Does your EGR have electrical an connector on it? If not consider blanking it off to see if it makes a difference.
When was the air filter last changed? Or the fuel filter?
Have you got any fault codes coming up?
Has it always felt this way?
Does it make any odd 'whooshing' noises?
What condition are the boost pipes in?
Does your EGR have electrical an connector on it? If not consider blanking it off to see if it makes a difference.
03-04-2012, 10:57 PM
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Cheers for the advice Dan, exactly what I was looking for!
I'd say it's no more pokey than my old Vectra DTI but easily reaches higher speeds. I've changed the fuel and air filters in the last 200 miles.
Not getting any fault codes (which I guess at least means there's nothing majorly wrong?)
Nope, no whooshing noises, but the slight judder right where I'd expect the turbo to be kicking in is curious...
I've changed the hose going from the inter cooler to the EGR valve and the one from the air box to the turbo as both were split... Are there any other hoses I should check??
The EGR valve has the electrical connection so blanking it isn't really an option... Though I have replaced it as it was sticking
Cheers Dan
I'd say it's no more pokey than my old Vectra DTI but easily reaches higher speeds. I've changed the fuel and air filters in the last 200 miles.
Not getting any fault codes (which I guess at least means there's nothing majorly wrong?)
Nope, no whooshing noises, but the slight judder right where I'd expect the turbo to be kicking in is curious...
I've changed the hose going from the inter cooler to the EGR valve and the one from the air box to the turbo as both were split... Are there any other hoses I should check??
The EGR valve has the electrical connection so blanking it isn't really an option... Though I have replaced it as it was sticking
Cheers Dan
05-04-2012, 09:04 AM
#13
Some do seem to be more fuel efficient than others, and my 130 is no where near as efficient as Brians. 130s do seem to do better mpg than the 115s, but 30mpg is way too low, even if you're kicking the crap out of it.
Are the brakes binding? Either jack it up and spin the wheels, or see if any of the wheels are particularly hot after a long drive. Is the cat, or exhaust blocked? Is there a lot of black staining on the bumper by the tailpipe?
Are the brakes binding? Either jack it up and spin the wheels, or see if any of the wheels are particularly hot after a long drive. Is the cat, or exhaust blocked? Is there a lot of black staining on the bumper by the tailpipe?
06-04-2012, 04:07 PM
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Good shout on the brakes - ill get them checked at some point over the weekend...
No staining on the bumper though - does that indicate the cat should be ok? There is some black smoke when revved but not enough to see while driving. It was pointed out by the mrs when she followed me
Put Ł40 of fuel (144.9 a litre) in it when it said it had 30 miles left and 170 miles later we're back to 30 miles left... Definitely something wrong there!
Cheers for the advice so far Dan - glad I joined this site
No staining on the bumper though - does that indicate the cat should be ok? There is some black smoke when revved but not enough to see while driving. It was pointed out by the mrs when she followed me
Put Ł40 of fuel (144.9 a litre) in it when it said it had 30 miles left and 170 miles later we're back to 30 miles left... Definitely something wrong there!
Cheers for the advice so far Dan - glad I joined this site
07-04-2012, 10:23 AM
#19
No, it doesn't have a DPF.
They all smoke 'a bit', and it's common to see a noticeable puff of smoke if you boot it (particularly at night you'll see it in the following car's headlights).
Black smoke would just suggest overfuelling - mine does it, particularly since fitting a decat and removing the EGR.
I'd also suggest doing a few 'brim to brim' fill ups to calculate the mpg properly. If you've got an iPhone there's a useful app called 'Road Trip'. There's probably something equivalent on Android.
This is what mine gets...
Not great, but then the majority of my driving is done along country lanes, and in town.
They all smoke 'a bit', and it's common to see a noticeable puff of smoke if you boot it (particularly at night you'll see it in the following car's headlights).
Black smoke would just suggest overfuelling - mine does it, particularly since fitting a decat and removing the EGR.
I'd also suggest doing a few 'brim to brim' fill ups to calculate the mpg properly. If you've got an iPhone there's a useful app called 'Road Trip'. There's probably something equivalent on Android.
This is what mine gets...
Not great, but then the majority of my driving is done along country lanes, and in town.
07-04-2012, 01:18 PM
#20
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My money is on the thermostat being buggered - if it's open and the engine over-cools then it will not hit it's efficient running temperature (obviously) and this will have an adverst effect on MPG.
10-04-2012, 11:38 PM
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Cheers for all the info guys - calculated it at 30.9mpg after 200 miles mixed motorway and town driving :-(
The thermostat was replaced very recently as it was leaking - I don't have any issues with the temperature gauge... Sits nicely in the middle. Probably takes around 5mins to get there. Although I am intrigued by "both" thermostats... Two?!
I've also cleaned the MAF sensor (the one near the air filter?) when I changed the hose as it was filthy - sadly made no difference.
Next ill be checking the brakes aren't binding but none of the wheels seem particularly in comparison to the others. Still... I'm desperate to solve this as its so frustrating!
I've downloaded that app too - seems very useful so will definitely make use of it, cheers!
Some great info coming out of this, cheers fellas
The thermostat was replaced very recently as it was leaking - I don't have any issues with the temperature gauge... Sits nicely in the middle. Probably takes around 5mins to get there. Although I am intrigued by "both" thermostats... Two?!
I've also cleaned the MAF sensor (the one near the air filter?) when I changed the hose as it was filthy - sadly made no difference.
Next ill be checking the brakes aren't binding but none of the wheels seem particularly in comparison to the others. Still... I'm desperate to solve this as its so frustrating!
I've downloaded that app too - seems very useful so will definitely make use of it, cheers!
Some great info coming out of this, cheers fellas
12-04-2012, 01:52 PM
#29
30 is way way too low, but you already know that. Could be worth your while booking it into a Delphi specialist for a diagnosis.
Also, cleaning your MAF isn't always a great idea as it's very delicate. If you've damaged it it could account for your abysmal MPG>
Also, cleaning your MAF isn't always a great idea as it's very delicate. If you've damaged it it could account for your abysmal MPG>
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