Judlad Posted December 8, 2012 Share Posted December 8, 2012 Hi Guys, New to the forum, recently bought a MK7 Titanium 1.6 TDCI fiesta and the fuel economy is very poor. Trip is indicating 32mpg and 260-300 to a tank driving like a saint. Exhaust is very black which would back up that the car is over-fuelling. No management light on or any issues showing through IDS V.70. Appreciate any ideas as at a brick wall! Cheers Justin. Quote Link to comment Share on other sites More sharing options...
BigD Posted December 8, 2012 Share Posted December 8, 2012 Could be a number of things (most would throw an error code) but I'd start with the MAF sensor, might be causing the engine to run too rich. It's on the hose coming out of the airbox. Remove the multiplug and screws, pull the sensor out carefully and give it a clean with some carb cleaner or similar, taking care not to break the wires (there are two with a resistor between). When I cleaned the one on my Mondeo (just because I could. Nothing actually wrong!) I used a cotton bud and sprayed carb cleaner onto that, then cleaned the MAF sensor that way. Quote Link to comment Share on other sites More sharing options...
Marcr1 Posted December 8, 2012 Share Posted December 8, 2012 Possibly need to clean the pipes out? Castrol GTX, Shell V power for a few fill ups and a heavy right foot - rev the S**t out of it? Tyre pressures are always a good one for fuel economy Quote Link to comment Share on other sites More sharing options...
Early-1800 Posted December 9, 2012 Share Posted December 9, 2012 I have a 1.6 TDCI Titty and it averages 55-60 (brim to brim measure, trip computer over reads by a couple of mpg) These are mainly long distance runs for work though. Lots of cold start shorter runs across town would see the figure drop but think, if genuine, 32mpg indicates a problem. Quote Link to comment Share on other sites More sharing options...
Marcr1 Posted December 9, 2012 Share Posted December 9, 2012 I should add I get 32 out of my 1.6 petrol Quote Link to comment Share on other sites More sharing options...
b1g_dav3 Posted December 9, 2012 Share Posted December 9, 2012 I was getting low 40's in my diesel, so I got in some BP Ultimate and gave it some, back up to 60's now :P got 69 to the gallon last night (or if you believe the computer, 99.9 to the gallon, if only). Quote Link to comment Share on other sites More sharing options...
DieselPig Posted December 9, 2012 Share Posted December 9, 2012 You don't say under what conditions you are driving the vehicle.If you drive mainly short distance urban areas you will have poor fuel economy, you should have bought a petrol car. Diesel engines get best performance over distance and constant engine speed. Quote Link to comment Share on other sites More sharing options...
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