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2007 Subaru Impreza Sedan i 4dr H4 MT

2007 Subaru Impreza Sedan
Trim Info:
All Wheel Drive, 4 Door Sedan, Sub-Compact
22 mpg city / 29 mpg hwy
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December 20, 2012, 8:19 am

Kevin B
 

Question: why does a car burn more fuel at cold idle than driving

car warming up in cold weather for 10 minutes verses driving down the road 25 miles


December 20, 2012, 1:07 pm

Ron W
Expert Mechanic

Engine is in fuel control (closed lop) when it is warmed up and the computer is making finer adjustments to the fuel strategy. Also when the vehicle is cold, the vehicle runs richer to help the engine warm up faster.


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