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Thread: Throttle Body Cleaning

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    Throttle Body Cleaning

    Anyone has done Throttle Body Cleaning on your Mirages? How do we know when to do it?



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    Quote Originally Posted by Gonggong View Post
    Anyone has done Throttle Body Cleaning on your Mirages? How do we know when to do it?
    I don't think this is needed on such a new car?

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage Intense 1.2 manual: 47.9 mpg (US) ... 20.4 km/L ... 4.9 L/100 km ... 57.6 mpg (Imp)


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    Uber Mirage alex16's Avatar
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    I checked mine about 2k miles ago at 36k miles, looks clean so does the original air filter.
    2014 ES F5MBD aka 5MT. I am a full time Uber driver, if you want to drive for uber DO not sign up without my referral code for a bonus .

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage ES 1.2 manual: 44.8 mpg (US) ... 19.1 km/L ... 5.2 L/100 km ... 53.9 mpg (Imp)


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    Thanks for the replies. I just check mine as well too and throttle still moves freely without sticking. I am just wondering cause the dealership service advisor said that it is dirty and needed throttle cleaning for Cad$195 plus tax. What a rip-off for an easy job.

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    Senior Member mitsumi's Avatar
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    did mine after 3yrs
    first time cleaning the throttle body.

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        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage GLS 1.2 manual: 26.3 mpg (US) ... 11.2 km/L ... 8.9 L/100 km ... 31.6 mpg (Imp)


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    Senior Member mitsumi's Avatar
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    BTW just a quick question

    After cleaning the throttle body is it normal when i started the engine it sounds like the engine is drowning. hehe sorry for the term not sure what to use. Inlet the cleaner dry first before starting the car.

    But after a few minutes its ok now when i start the engine

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        click to view fuel log View my fuel log 2015 Mirage GLS 1.2 manual: 26.3 mpg (US) ... 11.2 km/L ... 8.9 L/100 km ... 31.6 mpg (Imp)


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    Senior Member stevedmc's Avatar
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    Quote Originally Posted by mitsumi View Post
    BTW just a quick question

    After cleaning the throttle body is it normal when i started the engine it sounds like the engine is drowning. hehe sorry for the term not sure what to use. Inlet the cleaner dry first before starting the car.

    But after a few minutes its ok now when i start the engine

    Perfectly normal. Basically the car had to burn off the cleaner and was running rich.

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    The FSM says as follows about throttle body cleaning:


    THROTTLE BODY (THROTTLE VALVE AREA) CLEANING

    WARNING
    When touching the throttle valve, surely shut off the
    driving circuits of the throttle valve. In the event that
    the throttle valve is operated, a finger might be
    injured as the result of being caught by the throttle
    valve.
    CAUTION
    When the throttle body cleaning is performed, use scan
    tool MB991958 to initialize the learning value (Refer to
    GROUP 00)

    Precautions Before Service
    Initialization Procedure for Learning Value in MFI Engine P.00-41).
    1. Disconnect the electronic-controlled throttle valve connector.
    2. Remove the air intake hose from the throttle body.
    3. Remove the throttle body.
    4. Spray cleaning solvent on a clean cloth.
    Make sure the cleaning solvent does not enter the
    motor and the sensor through the shaft.
    Do not remove molybdenum. which is applied around
    the throttle valve of the throttle body.

    5. Wipe off the dirt around the throttle valve with the cloth
    sprayed with cleaning solvent.
    6. Install the throttle body.
    7. Install the air intake hose.
    8. Connect electronic-controlled throttle valve connector.
    Last edited by foama; 11-19-2018 at 11:22 AM.

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    Senior Member Mitz's Avatar
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    Quote Originally Posted by foama View Post
    The FSM says as follows about throttle body cleaning:

    ...
    4. Spray cleaning solvent on a clean cloth.
    Make sure the cleaning solvent does not enter the
    motor and the sensor through the shaft.
    Do not remove molybdenum. which is applied around
    the throttle valve of the throttle body.

    5. Wipe off the dirt around the throttle valve with the cloth
    sprayed with cleaning solvent.

    ...
    soot, a product of blowby builds up in due time, accumulates and becomes attached to the MAP Sensor affecting the metering accuracy of the MAP sensor and so ideal AFR may not be achieved. MAF sensor as used in US models (not MAP) being near to the air filter is much much cleaner as compared to models w/ MAP sensor which is practically inside the intake manifod.

    The throttle valve body do not become as dirty as the MAP sensor. I cleaned it only once following the instructions exactly as given in the manual. Others do the cleaning by spraying directly into the body.

    I do seldom clean the MAP sensor now as I've observed status of the sensor is clean ever since I installed an OCC

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    Senior Member Top_Fuel's Avatar
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    Be careful cleaning the throttle body on a drive-by-wire car. Manually opening the throttle plate can cause idle problems on some cars. I did this on a GM car and it took about 3 days for the car to re-learn where to idle.

    The proper procedure on some cars is to have an assistant step on the gas pedal to open the throttle plate instead of doing it manually like everyone is used to doing on older cars. Either that or disconnect the wiring harness from the throttle body during the cleaning process.


    Last edited by Top_Fuel; 06-13-2019 at 12:53 PM.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 51.6 mpg (US) ... 21.9 km/L ... 4.6 L/100 km ... 62.0 mpg (Imp)


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