The colder air of the winter is more dense which means there's actually more of it entering the air box.
A simple carburetta would add more fuel to stop the engine running lean. I should think a modern engine management system would compensate for air temp/pressure and control the amount of air entering the manifold. I'm not an expert. My old focus had an induction kit. I had to make a sock for it to wear over the winter.
As Marcr1 said check your tyre pressures, they might be down a bit. Remember fuel is also more dense and heavier so if you always have a full tank you will be lugging more weight around.
EnglishElectricMember Since 05 Dec 2012
Offline Last Active Dec 09 2012 11:19 AM
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2008 focus Titanium
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