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Loss Of Mpg.

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#31 minnis

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Posted 06 December 2012 - 04:11 PM

this morn my mrs's car read -3c on her car focus 1.6 diesel 2012 on mine it read 0c and when the car is warmed up the temp needle pointing to normal (12 o clock position),if it throttle it hard it needle goes back to (10 o clock position) then it goes back to normal.it defo has to be electrics now,anyone with idea of what it could be..

So you're assuming there is a problem that is causing low MPG?
It could be that your computer is wildly innaccurate, and you actually haven't lost much MPG (only that which is normal in winter). I wouldn't bother doing anything until you measure again with a manual fill up. I normally get low 50's in summer, but recently i've been getting very high 40's. However the trip used to be 0.1-0.2mpg out, but now it's showing 44mpg. Others have reported this problem as well.
Don't assume that your car has a major problem just because an innaccurate dashboard display says you do!

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#32 cragger89

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Posted 06 December 2012 - 04:16 PM

Respect accepted and I know that the temperature will change all the time, but the needle in general practice shouldn't move (unless there is a fault) - the only time I've seen the temperature needle drop even on a cold day is when I had a thermostat problem.

The temperature gauges doesn't normally even give a roughly accurate reading - it will just go in the middle once it is within the threshold of being at a normal temperature.

You are correct in saying it is only a real worry if it goes in to the red, but if it isn't running at full temperature, it is still a fault which should be resolved. I may not be correct, it's just something else the OP can look in to if he wants to.

#33 blue flash

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Posted 06 December 2012 - 07:31 PM

right men,have been doing some looking about on the net for the past 2 hours,what do you all think about the water temp sensor is faulty.i've read that this sensor water works the fuel mixture as well...
i also would like to thank you all for your answers and hopefully will sought something out soon,cheers Brian.....



















it's only what i've read

#34 blue flash

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Posted 30 January 2013 - 10:56 AM

ok,done the filling the fuel tank,used it all ? then filled it back up again.now acording to the caculations im useing 3 gallans less to a tankfull then what the gauge is showing me.any one have an idea of what could be faulty.gauge itself,gauge in the tank or any thing else,cheers for any answers.

#35 IINexusII

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Posted 30 January 2013 - 11:02 AM

What engine oil exactly did you use exactly? you just mentioned Eurocarparts. was it the A1 type that ford recommend?

#36 artscot79

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Posted 30 January 2013 - 03:08 PM

the focus needle on the temp gauge will indeed move from the 12 0 clock position as the engine gets up to the point where the thermostat opens and allows coolant through the radiator the pretty cold air will cool it way too much the temp needle drops and the thermostat closes its pretty simple if the gauge never budges ide be concerned having had a few fords not one in the winter has stayed solid in the middle till the engine has had a chance to fully warm up ie more than a 20 mile drive at temps below 6 degrees

it will rise than fall then the thermostat closes and it will rise and likely stay there the thermostat was changed via odb on later focis to show a constant temp even when its not at 90 degrees after lots of people went to ford complaining so from around 80 degrees on the later focis the gaiuge actually shows 90 degrees my gauge shows just below 90 however ford tested it and used laser thermometers and it was 90 degrees the gauge nor the sensor or thermostat was faulty other ti vct owners have had the same issue 3mpg is not that much of a difference to be honest even over a full tank and i dont think its anything to worry about the computer isnt accurate its a general ball park figure as is the temp gauge only the fuel gauge is really accurate

#37 FOCA

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Posted 30 January 2013 - 05:20 PM

ok,done the filling the fuel tank,used it all ? then filled it back up again.now acording to the caculations im useing 3 gallans less to a tankfull then what the gauge is showing me.any one have an idea of what could be faulty.gauge itself,gauge in the tank or any thing else,cheers for any answers.


The gauge is not accurate, they are "hit or miss" the tank also has a void in the top to allow for expansion, which can fill with fuel - ive got a big write up somewhere about it but can't find it, if i do i will pass it on

#38 blue flash

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Posted 01 February 2013 - 01:28 PM

i just used the europarts own 5w/30 semi oil,cant remember what,bottles goin in the bin.ok thanks foca.

#39 blue flash

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Posted 01 February 2013 - 01:32 PM

ok thanks to artscot 79.it's nice to know the motors not going blow up or worse.


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