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Old 11-04-2009, 11:12 AM   #6
jmatta
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Join Date: Nov 2007
Location: Chicago suburbs
Posts: 1,675
Disconnecting the battery resets the cars ECU to default settings. Your car will need to re-learn it's mapping next spring. You're better off leaving the battery in the car connected to a maintainer. My friend had all sorts of trouble getting his car to pass emissions after removing the battery due to the ECU reset.
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2002 Boxster S
1973 911 Green FrankenMeanie
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