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Thread: 2015 1.2L Mirage Engine Electronics Modules

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    2015 1.2L Mirage Engine Electronics Modules

    Purchased a complete 1.2L 2015 Mirage engine. Need help in determining what control components are needed to run a 1.2L Mirage engine on a engine stand, ie., ignition control module, engine control module, etc.



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    Still Plays With Cars Loren's Avatar
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    You want it "to run", "to run well", or "to run normally"?

    The basics for the engine to run would be the ECU and all fundamentally required inputs and outputs. Off the top of my head (I'm surely forgetting something)...

    The ECU needs these inputs, at a minimum:
    Crankshaft position
    Camshaft position
    Airflow (either MAF or MAP, whichever the car uses, maybe both)
    Throttle Position Sensor (it might maybe start without this)
    Clutch Switch (or Park/Neutral Switch) - can be bypassed, but won't crank without it.

    That would probably get it running. To run well (not be in limp mode), it would need:
    Intake Air Temp
    Coolant Temp
    O2 Sensor Front (wideband)
    O2 Sensor Rear
    All vacuum hoses (no vacuum leaks)
    Knock Sensor

    Additionally, this car may have/need: (guessing)
    Fuel Pressure
    Fuel Temperature
    Wheel Speed Sensors

    For outputs, the ECU would need:
    Electronic Throttle
    Coil Modules (directly controlled by the ECU)
    Fuel Injectors (directly controlled by the ECU)
    VVTI Solenoid (would probably run without it in limp mode)

    You're going to need 47+ PSI of fuel pressure, too. And, of course, if you're running it long enough to get warm, you need a cooling system.

    What I don't know is how integrated the ETAC system is with the ECU. Will the ECU run the engine without the ETAC system? I have no idea. Something tells me it might not.

    It might actually be a lot easier just to RUN the engine on a stand by skipping the stock systems and using something like a basic Megasquirt ECU. You can get a bare-bones MS2 for a couple hundred bucks. Give it Crank, Cam and MAP inputs and it will run the engine. Give it a couple of temperatures and a wideband O2 and it will run it better. Of course, then you'd have to program it and tune it. There's a guy here running a Mirage engine in an off-road quad using a MS, he could probably provide some insight on that.
    Simplify and add lightness.

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    Thank you for the details. I plan on putting this engine in a small airboat. My precious builds used a 2-stroke or 4-stroke small carbureted engine that did not require a control module. I will connect a radiator to the engine before starting. There will be no transmission, just direct drive gear reduction drive for the propellor. Is there a ODBII or laptop that I need to connect to verify what sensors need be met? The engine has all the sensors on it with the wiring harness. If possible I would like to keep the engine controls as simple as possible. I appreciate all the technical assistance.

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    It would be a lot easier if you had the FSM!

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    Fummins (01-10-2021)

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    Still Plays With Cars Loren's Avatar
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    Your best bet would probably be to get a factory ECU and engine wiring harness. (and ETACS if required) Try to get it running with all of the OE systems.

    Studying the systems and wiring in the factory service manual would surely help.

    Going with an aftermarket ECU like a Megasquirt could be simpler... But, there's a huge learning curve to learn to set that up and tune it. You'd either have to put in the time, or pay somebody to do it.
    Simplify and add lightness.

  7. #6
    There is a guy on here that put a Mirage engine and transmission into a buggy then added a turbo. He might know what is and isn't needed. Maybe send him a pm? https://mirageforum.com/forum/showth...o-3A92-Project

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)


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    Still Plays With Cars Loren's Avatar
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    He's the guy I was talking about above, thanks for looking him up! Pretty sure he used a Megasquirt for his engine control.
    Simplify and add lightness.

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    Back to school to learn about the Megasquirt ECU.
    Thank you for the information.



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    Loren (01-11-2021)

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