Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - UltraGauge and EOC / engine kill with ECU on

SentraSE-R · 06-12-2011, 01:51 AM

The UG does still calculate average and trip mpgs with the engine off and ignition and ECU on. The only display that doesn't work then is the instantaneous mpg.

As JethroBodine says, you can rig up a kill switch to the fuel injectors, which leaves the ECU on and the displays should continue working. Ignition swiches are cheap. I've saved well over $1800 in fuel costs by hypermiling - enough to buy all the clutches, starter motors, and ignition switches you all worry about replacing. And over 42,000 hypermiling miles, I've never replaced a one of them.

06-12-2011, 01:51 AM	#3 (permalink)
SentraSE-R Pishtaco Join Date: Jun 2009 Location: Bay Area, California Posts: 1,485 Mean Green Toaster Machine - '06 Scion xB Team Toyota 90 day: 48.92 mpg (US) Thanks: 56 Thanked 286 Times in 181 Posts	The UG does still calculate average and trip mpgs with the engine off and ignition and ECU on. The only display that doesn't work then is the instantaneous mpg. As JethroBodine says, you can rig up a kill switch to the fuel injectors, which leaves the ECU on and the displays should continue working. Ignition swiches are cheap. I've saved well over $1800 in fuel costs by hypermiling - enough to buy all the clutches, starter motors, and ignition switches you all worry about replacing. And over 42,000 hypermiling miles, I've never replaced a one of them. __________________ Darrell Boycotting Exxon since 1989, BP since 2010 Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin Mean Green Toaster Machine 49.5 mpg avg over 53,000 miles. 176% of '08 EPA Best flat drive 94.5 mpg for 10.1 mi Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg