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Old 12-18-2011, 11:11 AM   #1 (permalink)
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Does anyone have an idea, how to make a MPGuino to calculate and show my consumtion of gasoline and LPG sepeartely?

When I start the car it runs on gasoline for a while, until the engine temperature is high enough for the engine to run on LPG.

Last edited by LPG_Civic; 12-18-2011 at 11:32 AM..
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Old 12-21-2011, 04:01 PM   #2 (permalink)
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Hi LPG Civic -

I moved your question into the MPGuino subforum. Hopefully a better chance of someone reading & replying.
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
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has launched a forum for the efficient new Mitsubishi Mirage
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Old 12-25-2011, 05:25 AM   #3 (permalink)
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Thanks. Sure hope someone could help me.
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Old 12-25-2011, 07:42 PM   #4 (permalink)
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How about something that has a resistive element like a MAF and a temperature probe in the gas line. Some sort of controller could be used to crunch the data and produce a variable duty cycle signal to feed to the MPGuino.

Do you feed it gas or liquid?
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Old 01-19-2012, 07:23 PM   #5 (permalink)
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How about two MPGuinos, one for gasoline and one for LPG. I'm assuming the LPG system uses a solenoid valve to control the flow of LPG so you should be able to connect an MPGuino to that. It may take some head scratching to sort out how to read a total fuel efficiency but each MPGuino should give good readings for the fuel system it monitors.

When you switch fuels you can switch which MPGuino receives the speed pulses so each can give total distance and consumption for each fuel separately.

If your civic has an injector (for gasoline) at each cylinder then an MPGuino should work on that system. If your civic has a throttle body injection system for gasoline there will be difficulties getting consistent readings.

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Old 01-19-2012, 07:49 PM   #6 (permalink)
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how is the lpg metered? is it by some electronic injector or something more carb like, or worse?

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