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Poor mpg


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23 replies to this topic

#1 Flynn50

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Posted 03 November 2020 - 08:23 AM

I have a 2007 2.0 TDCi 130bhp 180k that is currently returning a woeful 32mpg.

I have a slightly binding offside rear brake which can't be helping Handbrake was OK so I replaced the caliper with no success.
I think it may be one of the pads stuck tight in the carrier. I seem to remember one was really difficult to get in when I did the rear discs and pads, although this was about 18 months ago.
Before I strip it down, how " snug" should the pads fit in the carrier?
I think there is another issue with the poor mpg but one step at a time

Thanks

Andy

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#2 nicam49

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Posted 03 November 2020 - 11:42 AM

You should be able to tell if it's binding by unevenly wearing pads. If one's much more worn than the other, than it's binding. Usually it's the caliper slide pins...theres a rubber sleeve on one of them (the lower one) that swells up and gets sticky if you lube it with mineral grease... silicon grease should be used, tho' if it's already sticky you must replace it. Bigg Red sell kits with them in.
<p><p>nicam49 2002 Mondeo TDCi Ghia X Estate mk3 pre facelift Stardust Silver+Rust.[b] 308,000+miles, but been off the road since Nov 2019 after timing chain slipped during fuel pump transplant. Awaiting return of mojo

#3 Flynn50

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Posted 03 November 2020 - 12:04 PM

Thanks for the reply.

I have already changed the pin with the rubber sleeve on as it was quite stiff. The other seemed quite loose.
Although the new pin is easier to slide there is a bit of resistance still but I would think you are going to get that anyway due to the sleeve


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#4 nicam49

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Posted 03 November 2020 - 12:53 PM

As long as you only lubed it with silicon and not mineral grease else its deja vu all over again. How about uneven pad wear? Any sign of that?
<p><p>nicam49 2002 Mondeo TDCi Ghia X Estate mk3 pre facelift Stardust Silver+Rust.[b] 308,000+miles, but been off the road since Nov 2019 after timing chain slipped during fuel pump transplant. Awaiting return of mojo

#5 Flynn50

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Posted 03 November 2020 - 11:17 PM

I'll strip it down and report back

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#6 Colfair

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Posted 09 November 2020 - 03:24 PM

Hi everyone, I’ve got a 2004 tdci130 automatic, 70000 miles, had it for about 8 months, it’s showing 36mpg admittedly nearly all town driving, not that happy !



#7 Communist

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Posted 09 November 2020 - 03:44 PM

My MPG has hit the 20s at times. Traffic around here being what it is, probably spent more time idling than moving. Yes it's a petrol engine but we all do 0 mpg when sitting still. Mondeos are pretty heavy cars and they take a lot of energy to get moving, so crawling in traffic will murder your MPG.

 

Winter really doesn't help. Colder air has more resistance, lights and heater being in constant use, traffic is usually worse, colder gearbox meaning more resistance, warm up takes longer. I'm told they do something with the fuel too but I'm not sure what exactly. Cumulative effect of all this means I would get about 5-10mpg more in summer than winter.


Edited by Communist, 09 November 2020 - 03:48 PM.


#8 PURPLE_2L_LX

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Posted 10 November 2020 - 04:42 AM

29mpg average over a full tank one winter. That was the 2L diesel in good working order.

 

Jack it up and spin the wheel, will it carry on spinning or is it hard to turn?  Larger engine

and short journeys will eat the fuel.

 

They work best on a decent run.  Binding brakes then your fighting the drag.


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#9 Rekusu

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Posted 11 November 2020 - 07:59 AM

There is an easy way to detect binding brakes.

 

After a run, go around and check if there is any heat emanating from the calipers.  The one that is binding will be warm or even hot.

 

As an alternative, obviously while the car is stationary, stick your finger through the spokes and touch the disk.  The binding wheel will be bloody obvious!


What if the Hokey Cokey IS what it's all about?

#10 PURPLE_2L_LX

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Posted 11 November 2020 - 11:30 AM

There is an easy way to detect binding brakes.

 

After a run, go around and check if there is any heat emanating from the calipers.  The one that is binding will be warm or even hot.

 

As an alternative, obviously while the car is stationary, stick your finger through the spokes and touch the disk.  The binding wheel will be bloody obvious!

 

 

Almost there..   If you had said the binding wheel will be blisteringly obvious you would have won todays gold star.   :D

 

 


MK4.5 TDCI 140 Business Estate.

 

MK3 FUSE INFO CLICK HERE ... FORD WIKI CLICK HERE .... FORD ETIS CLICK HERE

Adding your location may find someone local who could offer assistance.

F-Super, Bluetooth OBDII (ELM) and a MS509 scanners (test subjects required).

ForDiag now available to victims.





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