Jump to content


Show
Photo

Mondeo St Tdci Poor Mpg


  • Please log in to reply
23 replies to this topic

#1 Xeon5

Xeon5

    Member

  • New Member
  • PipPip
  • 12 posts
  • Name: Jason
  • Ford Model: Ford Mondeo ST155 TDCi
  • Year: 2005
  • Location: Gloucestershire

Posted 02 January 2012 - 04:11 PM

Hey guys,

Recently bought a 05 mondeo st155 with 47k on a clock and now been running it for about 2 weeks. I last filled it up to full on the 21st of last month and have done 202 miles so far. Now I understand diesels don't preform as well on cold runs but I was still expecting at least 30mpg minimum. The gauge is currently just slightly above a quarter of a tank, the miles left is 139, and the average mpg is 34mpg.

Is there any common problems with the st tdci that affect mpg or is there anyone here who owns one who can help me with this?

Have something to contribute?

Sign in or register to start a topic...

Sign up to FOC Premium Membership To Remove These Ads

#2 stef123

stef123

    Ford Enthusiast

  • Management
  • 4,512 posts
  • Name: Stef
  • Ford Model: Mondeo ST TDCI
  • Year: 2006
  • Location: Scotland
Contributor

Posted 02 January 2012 - 06:05 PM

at the moment i am seeing just less than 40mpg, mostly short journeys and i sit for a min or two to try and let the oil circulate and heat up slightly before going anywhere..
in the summer im getting about 45-50mpg

are you getting any excessive white smoke on startup?

#3 Xeon5

Xeon5

    Member

  • New Member
  • PipPip
  • 12 posts
  • Name: Jason
  • Ford Model: Ford Mondeo ST155 TDCi
  • Year: 2005
  • Location: Gloucestershire

Posted 02 January 2012 - 06:20 PM

at the moment i am seeing just less than 40mpg, mostly short journeys and i sit for a min or two to try and let the oil circulate and heat up slightly before going anywhere..
in the summer im getting about 45-50mpg

are you getting any excessive white smoke on startup?


I havent really noticed any white smoke but I will look out for that. What would that mean if there was?

I just filled up and it cost 41 to fill up from a quarter which doesn't seem right. Thats 30.25 litres meaning there is about 28 left. Maybe a fuel gauge problem?

#4 stef123

stef123

    Ford Enthusiast

  • Management
  • 4,512 posts
  • Name: Stef
  • Ford Model: Mondeo ST TDCI
  • Year: 2006
  • Location: Scotland
Contributor

Posted 02 January 2012 - 06:23 PM

I havent really noticed any white smoke but I will look out for that. What would that mean if there was?

I just filled up and it cost £41 to fill up from a quarter which doesn't seem right. Thats 30.25 litres meaning there is about 28 left. Maybe a fuel gauge problem?


that figure doesn't seem right at all, from empty IIRC costs me about £75 (55litres) and from a quarter tank on the gauge its usally about £60 (45litres)

how many miles have you done for that 30.25 litres?

they are known for injector issues, so any excessive white smoke on a cold start up could be injector issues but it sounds more like a dodgy gauge or sender here..

#5 TDCiST

TDCiST

    No Smoke No Poke... Unless you have a DPF!

  • Moderator
  • 1,681 posts
  • Name: Dave
  • Ford Model: Ford Focus Zetec S 1.6 TDCi
  • Year: 2010
  • Location: Hertfordshire
Contributor

Posted 02 January 2012 - 06:25 PM

EGR valve is a common thing on the 2.2, This can affect MPG. Is the car smoking excessively on full chat??

You should notice more grey/black mist/smoke if its blocked/wedged open

#6 stef123

stef123

    Ford Enthusiast

  • Management
  • 4,512 posts
  • Name: Stef
  • Ford Model: Mondeo ST TDCI
  • Year: 2006
  • Location: Scotland
Contributor

Posted 02 January 2012 - 06:33 PM

do you know if its a euro 3 or 4 engine? I think the face lift ST has the euro 4 engine..

#7 Xeon5

Xeon5

    Member

  • New Member
  • PipPip
  • 12 posts
  • Name: Jason
  • Ford Model: Ford Mondeo ST155 TDCi
  • Year: 2005
  • Location: Gloucestershire

Posted 06 January 2012 - 06:29 PM

Mine is an 05 plate which I think was pre-facelift but tbh I can't notice much difference between mine and others.

I work for a motor factor and I asked a few garages I delivered to and they say that it could be the fuel sender unit. One said they can get dirty and give a false reading. Since filling up I've done 55 miles, trip shows 333 miles till empty and 31.5mpg which is ok for short town travel. I also record my fill ups on my iPhone Gas Cubby app which gives me my average.

Also, I'm not sure about the euro 4, euro 5 thing.

Edit: here's a picture of the dash at the moment.


Dash Pic

#8 stef123

stef123

    Ford Enthusiast

  • Management
  • 4,512 posts
  • Name: Stef
  • Ford Model: Mondeo ST TDCI
  • Year: 2006
  • Location: Scotland
Contributor

Posted 06 January 2012 - 07:05 PM

Is the engine switched off or is the eml light on?

#9 Xeon5

Xeon5

    Member

  • New Member
  • PipPip
  • 12 posts
  • Name: Jason
  • Ford Model: Ford Mondeo ST155 TDCi
  • Year: 2005
  • Location: Gloucestershire

Posted 06 January 2012 - 11:47 PM

I turned the key around to point two. Ignore the light, should of mentioned that

#10 Xeon5

Xeon5

    Member

  • New Member
  • PipPip
  • 12 posts
  • Name: Jason
  • Ford Model: Ford Mondeo ST155 TDCi
  • Year: 2005
  • Location: Gloucestershire

Posted 09 June 2012 - 03:27 PM

Been a while since I started this thread. Cars been great, gave it a good service a few months ago with some castrol magnetec, and been using shell fuel save instead of supermarket fuel. Now I've noticed a slight improvement but the guage still seems to move quickly. Is there anyway I can do a type of factory reset on the dash, or would it be easier to just have the sender unit looked at?
My friends got a 2.0 tdci LX which does 380+ miles around town per tank, but mine never seems to go above 290.

#11 TDCiST

TDCiST

    No Smoke No Poke... Unless you have a DPF!

  • Moderator
  • 1,681 posts
  • Name: Dave
  • Ford Model: Ford Focus Zetec S 1.6 TDCi
  • Year: 2010
  • Location: Hertfordshire
Contributor

Posted 10 June 2012 - 01:33 PM

are you calculating the MPG or taking the dash reading??

#12 Xeon5

Xeon5

    Member

  • New Member
  • PipPip
  • 12 posts
  • Name: Jason
  • Ford Model: Ford Mondeo ST155 TDCi
  • Year: 2005
  • Location: Gloucestershire

Posted 14 June 2012 - 05:30 PM

I'm using an app on my phone. It's saying around on average im doing 31.3mpg. That's a mix of short journeys with the odd day drip. The highest of got was 36mpg. That was across 1 full tanks at two partial fill ups.

I think it's the sender tbh

#13 Podzak

Podzak

    Settling In Well

  • Budding Enthusiast
  • PipPipPip
  • 99 posts
  • Name: Peter
  • Ford Model: Mondeo 2.2 Diesel Estate Ghia
  • Year: 2006
  • Location: Northumberland

Posted 14 June 2012 - 10:59 PM

My 2.2 Mondeo Estate diesel gets 48 mpg most of the time and has managed 60 on a run.
If it only got 31, I'd leave it with the keys in and hope it got stolen! :huh:

#14 Xeon5

Xeon5

    Member

  • New Member
  • PipPip
  • 12 posts
  • Name: Jason
  • Ford Model: Ford Mondeo ST155 TDCi
  • Year: 2005
  • Location: Gloucestershire

Posted 15 June 2012 - 12:53 PM

My 2.2 Mondeo Estate diesel gets 48 mpg most of the time and has managed 60 on a run.
If it only got 31, I'd leave it with the keys in and hope it got stolen! :huh:


Hmm, well whenever i fill up when its on the red light it never seems to cost me more than £58 (based on around £1.429 per litre), and based on what I put in, the tank had between 17 - 20 litres left in the tank, which is odd as it has a 58.5 litre tank. I want to see how far I go when I get it to the red light but think it would be too much of a risk, because even if i was doing 31mpg, i should still get 360 from a tank.

#15 Podzak

Podzak

    Settling In Well

  • Budding Enthusiast
  • PipPipPip
  • 99 posts
  • Name: Peter
  • Ford Model: Mondeo 2.2 Diesel Estate Ghia
  • Year: 2006
  • Location: Northumberland

Posted 15 June 2012 - 03:17 PM

Hmm, well whenever i fill up when its on the red light it never seems to cost me more than £58 (based on around £1.429 per litre), and based on what I put in, the tank had between 17 - 20 litres left in the tank, which is odd as it has a 58.5 litre tank. I want to see how far I go when I get it to the red light but think it would be too much of a risk, because even if i was doing 31mpg, i should still get 360 from a tank.


Sorry m8 but red light/ammount put in is all mumbo-jumbo.
Fuel gagues tell more lies than politicians.
The ONLY way is to fill up, right up, zero the trip mileage and drive.
Then, when you fill right up again, divide the miles done by the gallons ( liters x .22 ). &--#60; There is a more accurate sum but that is nigh enough.

If you live near Northumberland I can connect my fault code reader for you.


Good luck.

Have something to contribute?

Sign in or register to start a topic...


Not what you're looking for?

Register now, we have a huge community of enthusiasts to answer any questions you might have



0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users