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Old 06-02-2011, 11:31 AM   #11 (permalink)
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OBD 2 does not actually output true MPG since it does not monitor injector pulses, it just infers it via several engine statistics, you could look up what is being used, and set up a system to monitor it yourself. It uses the MAF along with several other sensors to determine engine load.

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Old 03-23-2015, 01:16 PM   #12 (permalink)
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Will a MPGuino work on a diesel?

I think it should work. I will do in my Mercedes diesel of 1993, as soon as I get rid of my pain on my back. If you connect as follows:

The mpguino has 4 inputs:

1. +12 VDC
2. - ground
3. Speed pulse.
4. Fuel use pulse.

For sure yr Swift has 1, 2, 3.

Use yr rpm signal as substitute for fuel injection signal. It should give a good approximation.

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Old 03-30-2015, 04:19 AM   #13 (permalink)
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Quote:
Originally Posted by archat68 View Post
BTW the car is 2008 build, runs a CRDI engine. Has OBDII but the protocol followed by the manufacturer is proprietary and the SGII doesn't works with it.
Yoou can try to find fuel consumption signal going from your ECU. Many new ECUs have one. I've used it to hook up MPGuino to my BMW tds. It worked like a charm.

I can;t tell you if the signal from the injectors of CRDI engine will be sufficient for MPGuino, but I may try it with my wife's Cirtoen with HDI (similar to CRDI) engine. But don;t expect any quick results, I'm running out of time recently.

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