Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post

MetroMPG · 11-26-2012, 02:18 PM

My ScanGauge typically reads 0.1 - 0.2 volts low compared to a voltmeter reading at the battery itself.

You say you checked the voltage via the ScanGauge with the car "off". But was the ignition turned to "on" or "accessory"? If so, that will drop battery voltage some (compared to not having the ignition key in).

You can check voltage via the SG without the ignition key by waking it up -- pressing a button -- and calling up voltage gauge.

11-26-2012, 02:18 PM	#8 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,534 Blackfly - '98 Geo Metro Team Metro Last 3: 70.09 mpg (US) MPGiata - '90 Mazda Miata 90 day: 54.46 mpg (US) Appliance car Mirage - '14 Mitsubishi Mirage ES (base) 90 day: 57.73 mpg (US) Thanks: 4,082 Thanked 6,979 Times in 3,614 Posts	My ScanGauge typically reads 0.1 - 0.2 volts low compared to a voltmeter reading at the battery itself. You say you checked the voltage via the ScanGauge with the car "off". But was the ignition turned to "on" or "accessory"? If so, that will drop battery voltage some (compared to not having the ignition key in). You can check voltage via the SG without the ignition key by waking it up -- pressing a button -- and calling up voltage gauge. __________________ Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata Honda mods: Ecomodding my $800 Honda Fit 5-speed beater Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage. Ecodriving test: Manual vs. automatic transmission MPG showdown EcoModder has launched a forum for the efficient new Mitsubishi Mirage www.MetroMPG.com - fuel efficiency info for Geo Metro owners www.ForkenSwift.com - electric car conversion on a beer budget