Alternative fuel consumption instruments
"MPGuino" is a DIY, open source digital fuel economy display for cars with electronic fuel injection that can be made for about $40-50 from readily available components.
It's ideal for people with older cars, where a commercial OBD-II computer can't be used (or isn't affordable).
The SuperMID is a similar open source device (knowledge of the Japanese language for documentation may be useful).
Other alternatives exist, see the options table below
|Name of instrument||Car Type it will work on||Cost instrument||User feedback|
|Scangauge 2||Cars that have an OBD2 interface||$150|
|MPGuino||Most cars with electronic fuel injection||$50|
|AutoMeter 9110 ecometer||Any car with electronic fuel injection|| From a user report
The AutoMeter 9100 ecometer is neither as versatile nor as functional as the SGII, although it *is* cheaper in cost.
Its MPG display is as accurate as the SGII, but its MPH and RPM displays were always "dithering" around a value and seemingly never "settled" down.
Most damningly, the 9100 literally "...ran down the battery..." in my brand-new Vibe after only 6 days of inactivity! This has NEVER happened with the SGII that I now use.
|Golink||$100||This is an OBD to iphone or ipad cable comes with free iphone application software|
|Ultragauge||Cars that have an OBD2 interface||$60||See ecomodder user phantoms feedback|
|Fuel efficiency characterization project|
Instructions for mod
Refer to installation manual for particular device
For OBD2 devices typical installation will be
-Plug the OBD connector into the instrument
-Mount the instrument
-Maybe connect power
For instruments that use the injector signal typically the installer will need to connect the device to the following
- An injector signal
- Speed / odometer signal
- Battery for power
Please enter your user name and any relevant data in the table
|User Name||Car Make, Model, Year||Cost of Mod||Time to Perform Mod||MPG Before Mod||MPG After Mod||MPG improvement guess||Instruction Link|
|Enter your data here||Enter your data here||Enter your data here||Enter your data here||Enter your data here||Enter your data here||Enter your data here|
The efficiency effects of this mod are likely to be the same as for a scangauge. Refer to ScanGauge OBD-II computer (and similar) for more efficiency numbers.
Problems / Consequences of mod
- Some unit installations requires connection to injector signal. A faulty unit or poor installation may stop injector firing properly (Although unlikely)