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27 votes
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What causes a 20% difference in fuel economy between winter and summer?

Your fuel economy change is caused by the fact you're not using the same fuel. Fuel changes twice per year from summer blend to winter blend and back again causing a change in the Reid Vapor Pressure (...
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17 votes
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Replacement ford fiesta radiator has extra hose

What you've been sent is the radiator for the diesel variant - as opposed to what appears to be the 1.25l Zetec petrol engine in your first diagram. You're correct in that the "main" radiator ...
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11 votes
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How do old cars actually lose horsepower?

It depends on a ton of things and it won't be linear in most cases. Every car has different things that wear out at different rates and those things affect horsepower differently as they age. Not ...
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  • 1,925
6 votes

Ford Fiesta Mk6 heater blower fan motor resistor location?

Hopefully not a bad assumption, but I'm assuming you're vehicle is right hand drive (European). That said, to get to your resistor pack, there is a kick panel which has to be removed which is against ...
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6 votes

When driving car at 100-120km/h steering wheel starts to vibrate

Tires are out of balance, or possible a bent rim. Take it back to where the tires were put on and tell them you have a vibration. If you have a vibration when you are using the brakes that goes away ...
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4 votes
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Intermittent starting trouble with new battery

If your starter motor is working 8 times out of 10 then you probably need to replace it. It very likely has developed a dead spot on the armature. If the armature is positioned so that the brushes ...
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  • 248
4 votes

Oil leak: any idea of the likely source?

You have to clean the engine bay first When troubleshooting for the source of an oil look you first have to completely clean off all of the old oil, dirt and built up grime. You can get a citrus ...
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4 votes
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2012 Ford Fiesta S speedometer calibration

UK type approval states that a speedometer may read with upto a 10% error provided that the speed shown is either true or over. A speedometer may not under read when a car is new. Most manufacturers ...
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4 votes

What causes a 20% difference in fuel economy between winter and summer?

Another reason: Winter tires. Choose between hard tires (good fuel economy, REALLY bad on snow) or soft tires (worse fuel economy, good on snow).
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  • 145
4 votes

What causes a 20% difference in fuel economy between winter and summer?

Your vehicle does not operate at maximum efficiency until the engine has reached its normal operating temperature. This is generally when the coolant temperature reaches about 200 degrees Fahrenheit. ...
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4 votes

2012 Ford Fiesta - New Engine, Harness, Sensors, and PCM - Still Crank, No Start

P0340 is certainly a reason why the vehicle isn't starting but it indicates an issue with the camshaft position sensor rather than the crank. You really need to check the output of the camshaft ...
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3 votes
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What "type" of engine does a Ford Fiesta, 2008, style climate D, 1.4 TDCi have?

It's a little unclear what you're asking for, but your car has this engine: Ford DLD. It is a inline, 4 cylinder Diesel engine with a turbocharger, but it most likely doesn't have an intercooler. ...
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3 votes

What causes a 20% difference in fuel economy between winter and summer?

In the winter the ambient air is much colder, making the air more dense. Denser air will contain more oxygen and so the car will inject more fuel in order to maintain the correct ratios. This effect ...
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  • 159
3 votes
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1997 Ford Fiesta Strange Ticking Noise

tl dr: There is almost no way to tell from the video what is causing the noise. From the video it sounds like an exhaust leak causing the tick ... but smartphone video is notorious for not giving an ...
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3 votes

Diesel engine suddenly doesn't start and returns to normal without aparent reason

It's very possible that you have a problem in the glow-plugs of your diesel engine. Glow-plugs are used to preheat the combustion chamber on a cold engine. If you're having problems starting the car ...
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3 votes

Waterbottle cap still poping off

Maybe cap or reservoir has fractures inside and you don't notice it. When the pressure increases (which is normal) damaged teeth can't withstand that load. Try to change your water reservoir and it's ...
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3 votes
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Draining wiper fluid

I see two ways there: Just drain it empty Overfill your wiper fluid container with water. That way you could wash the old fluid out or at least thin it. Then drain empty again. Because to unscrew ...
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  • 746
3 votes

When driving car at 100-120km/h steering wheel starts to vibrate

The usual culprits are one or more of the following (from most- to least likely): flat spots on tires caused by wheelspin or locking brakes unbalanced rims bent rims (very) cheap tyres worn shock ...
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3 votes
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Ford Fiesta Mk6 engine component

The part you are pointing to is the air intake for your engine. This pipe should be coming from the intercooler. Since your engine is a turbo diesel, this would be directly related to why your engine ...
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3 votes

Power steering doesn't turn on until gas pedal is depressed

It sounds as though your serpentine belt is the issue. The serpentine belt is connected to each pulley (a pulley is the circular disc that the rubber belt travels over) of various engine components (...
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  • 163
3 votes

Ford Fiesta zetec 2014

Absolutely normal. When you take your foot off the brake, the front brakes are release which puts all of the stopping power to the rear brakes where the hand brake (E-brake) is applied. Once this ...
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2 votes

I have a 2001 ford fiesta that when I brake the steering wheel vibrates up and down not side ways

I've experienced this on a Ford Escort RS Turbo and the source of the vibration was traced to a warped brake disc. This was exacerbated on this particular car as the wheel design meant one side of he ...
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2 votes

Ford Fiesta Mk6 heater blower fan motor resistor location?

here is a clear picture underthe dash of a right hand drive fiesta. it may be the same for older fiestas but this one is a 2011
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2 votes

Ford Fiesta 2001 1.25 engine issue

Try this: Turn off the engine and close all the doors Turn the key to electrical systems on (Position II) Hold down the gas pedal and brake pedal simultaneously for over 20 seconds This is, at least ...
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  • 5,216
2 votes

Ford Fiesta 2001 1.25 engine issue

Disconnecting the battery of the vehicle will erase any stored engine codes (remove positive and negative cables and then wait for 15 minutes for residual charge to empty), but I would recommend ...
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  • 1,948
2 votes

What causes a 20% difference in fuel economy between winter and summer?

Presumably in winter you'll have lots of additional systems switched on such as the heating, demisters, headlights, etc... All of these things sap your fuel consumption.
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2 votes

Engine gradually loses power while driving highway speeds

I've experienced this once before on a Lancia Y10. The fuel breather was blocked so as the fuel level decreased, a vacuum would form above the fuel in the tank and eventually this would overcome the ...
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2 votes

UK - Fiesta 2001 1.25 P0302 Cylinder 2 Misfire Detected

If you have a coil on setup or even a coil over (both with individual coils per cylinder), change out the #2 cylinder coil with a different coil ... doesn't matter which one. If the misfire follows ...
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2 votes

Ford fiesta diesel brake pedal hard

If the pedal is so hard that it has little effect on the brakes it is most likely a vacuum issue. On diesels there is a separate vacuum pump connected to the brake servo via a pipe. Check the pipe ...
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  • 2,742
2 votes

Clutch Fault, Ford Fiesta ST 16 Plate

I agree that a 1 year old car with 11k miles should NOT have issues like that. That said, there are a few things you should do. Check the warranty paperwork that should have come with your car. ...
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