octane FORD FIESTA 2007 Workshop Manual

Fuel Charging and Controls - 2.OL
303-04B-5 Duratec-HE (M14) 303-04B-5
DIAGNOSIS AND TESTING
Fuel Charging and Controls
General Equipment
Wgnostic System (WDS) I
Principles of Operation
Ethanol equipped vehicles
Ethanol, is derived from cellulose waste. A large
proportion of Ethanol is distilled from corn, wheat
and sugar cane crops. The product that is to be
used in this vehicle is called Ethanol E85. E85 is
a mixture of 15% gasoline and 85% Ethanol.
Ethanol is a clear liquid and when fully burnt the
combustion gasses remaining are Carbon Dioxide
and water. This makes the use of Ethanol a good
environmental proposition. One drawback with pure
Ethanol is that it is corrosive to certain rubber and
plastic materials. The
introduction of Ethanol E85 has required some
major internal changes to the fuel supply and
delivery system. Some earlier vehicles used an
Ethanol mixture called Ethanol
El 5. This fuel was
made up of 15% Ethanol and 85% gasoline. At this
mixture ratio, no changes to the fuel charging or
delivery system where required, as no degradation
would occur with the cylinder head valves or
material content of the components, although some
performance loss would be noticeable.
The components used by vehicles running Ethanol
appear to be the same in construction as those
that use unleaded fuel only. The changes are
mainly to do with the materials used and increases
in fuel flow rates.
Ethanol has a much higher octane rating than
standard fuel which means that the ignition and
fuel injection calibrations for a vehicle that is
capable of using Ethanol E85 must be adapted
suitably.
I Item Description
I 1 I Fuel injectors
1ue1 rail I
2006.0 Fiesta 1212006 GI 65371 en
Item Description
3
4
Block heater
Fuel pump module
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