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Daox · 06-14-2011, 02:26 PM

Popping in the exhaust sounds like backfiring which means you're running rich which explains the bad mileage. I'd pull your spark plugs out and take a look at them. If you don't know how to read plugs, take a picture of them and post them here.

06-14-2011, 02:26 PM	#6 (permalink)
Daox Administrator Join Date: Dec 2007 Location: Germantown, WI Posts: 11,203 CM400E - '81 Honda CM400E 90 day: 51.49 mpg (US) Daox's Grey Prius - '04 Toyota Prius Team Toyota 90 day: 49.53 mpg (US) Daox's Insight - '00 Honda Insight 90 day: 64.33 mpg (US) Swarthy - '14 Mitsubishi Mirage DE Mitsubishi 90 day: 56.69 mpg (US) Daox's Volt - '13 Chevrolet Volt Thanks: 2,501 Thanked 2,586 Times in 1,554 Posts	Popping in the exhaust sounds like backfiring which means you're running rich which explains the bad mileage. I'd pull your spark plugs out and take a look at them. If you don't know how to read plugs, take a picture of them and post them here. __________________ Current project: A better alternator delete