Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Geo Metro plug-in parallel hybrid EV

MetroMPG · 03-20-2009, 11:40 AM

It's possible you have a brush timing/wiring problem - could the noise you're hearing be arcing?

If the motor had the brushes advanced for rotation in one direction, in the "wrong" direction you'd be getting reduced torque, arcing (potentially damaging the commutator) and a funny noise. Ask me how I know this.

03-20-2009, 11:40 AM	#88 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,515 Blackfly - '98 Geo Metro Team Metro Last 3: 70.09 mpg (US) MPGiata - '90 Mazda Miata 90 day: 52.71 mpg (US) Even Fancier Metro - '14 Mitsubishi Mirage top spec 90 day: 70.75 mpg (US) Appliance car - '14 Mitsubishi Mirage ES (base) 90 day: 52.48 mpg (US) Thanks: 4,062 Thanked 6,960 Times in 3,604 Posts	It's possible you have a brush timing/wiring problem - could the noise you're hearing be arcing? If the motor had the brushes advanced for rotation in one direction, in the "wrong" direction you'd be getting reduced torque, arcing (potentially damaging the commutator) and a funny noise. Ask me how I know this. __________________ 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