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SoobieOut · 12-30-2013, 12:30 AM

Sounds like a vacuum leak with the idle revving issue and bad mileage. Look for loose hoses or possibly a bad gasket. You could find it by spraying Carb cleaner around suspected areas while engine is idling an see if RPM changes.

12-30-2013, 12:30 AM	#4 (permalink)
SoobieOut Polymorphic Modder Join Date: Aug 2010 Location: Utah Posts: 307 2006 DaCivic Hybrid - '06 Honda Civic Hybrid 90 day: 45.16 mpg (US) Thanks: 188 Thanked 40 Times in 25 Posts	Sounds like a vacuum leak with the idle revving issue and bad mileage. Look for loose hoses or possibly a bad gasket. You could find it by spraying Carb cleaner around suspected areas while engine is idling an see if RPM changes.