ECOBOOST OWNERS WHO HAVE REMOVED ACTIVE GRILLE SHUTTERS

Discussion in 'Mustang S550 General Forums' started by Dadillac, Feb 13, 2020.

  1. Dadillac

    Dadillac Well-Known Member

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    So I am going to have my front bumper off (eventually) to install a new grille. I know that the active grille shutters are predominantly just for MPG. So really not an important part to have on the car. I am probably gonna remove them and chuck em. Anyone who has removed them have you gotten any codes due to them missing? Anyone regret removing them? Please chime in. Thanks

    Don
     
  2. FreePenguin

    FreePenguin Well-Known Member

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    Can’t comment, my car didn’t come with them because I had a block warmer lol.

    But my car functions normally, can’t comment on mpg. I have a large spoiler and I get like 30 or so mpg highway w 3.31 gears
     
  3. OP
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    Dadillac

    Dadillac Well-Known Member

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    Yeah the MPG isn't even a concern. My understanding is that the shutters reduces drag by 3% and raises MPG by 1%. This isn't even calculable really. My concern is that the computer is going to send a command to a part that is no longer there. So codes being set are my real concern. But maybe this itself isn't even an issue. Why I am asking really.

    Don
     
  4. FreePenguin

    FreePenguin Well-Known Member

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    A lot of people ziptie the sensor up, instead of disconnecting it, or it’s the motor

    I don’t remember, but I read up on it heavily before I found out my car didn’t even have them due to block heater, it nulls them from factory

    If I recall some people disconnected, some had a cel and some don’t. Not sure the science behind it
     
  5. Scootsmcgreggor

    Scootsmcgreggor Well-Known Member

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    It won’t throw any codes. It’s controlled through the body harness so there is a fault if you got a scanner into that system from what I’ve heard but it can’t throw a code on the dash. Took mine out and other than better cooling and looking cleaner behind the grill no noticeable effects
     
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  6. War-Machine

    War-Machine Well-Known Member

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    I took mine off when I did a large intercooler upgrade, and never saw any codes until recently. It likely won't give you a CEL, but it may have a code come up eventually about them being disconnected/ lost communication.
     
  7. Armageddon Turbo

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    This is correct
     
  8. OP
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    Dadillac

    Dadillac Well-Known Member

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    So if I remove the motor from the shutters, leave it plugged in, and tie it up all should be good with the world?

    Don
     
  9. Vlad Soare

    Vlad Soare Well-Known Member

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    Just a few days ago I stumbled upon a discussion on the same subject on a Mondeo forum. In the Mondeo, if the shutters are missing, the motor is unable to determine its upper and lower limits (which it does as part of its startup self-test), and throws an error. And as a consequence of that error the fans will run constantly at full speed.
    Someone had this symptom, and the cause proved to be a broken shutter. He removed it altogether, leaving just the motor in place, but to no avail. When he installed a new shutter the fans stopped.
    Whether it's the same in the Mustang, I don't know. You'll have to test it.
     
  10. Blue Moon

    Blue Moon Well-Known Member

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    I pulled my shutters last summer, motor and all, and have no codes. I just zip tied the plug to the bumper so it wouldn't flop around and wrapped the plug in electrical tape just in case water manages to splash up in there. No lights, no codes, no problems at all, and a few pounds lighter in the nose. And no change in mpg either.
     
  11. OP
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    Dadillac

    Dadillac Well-Known Member

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    I guess when I have the bumper cover off I will decide what I will do. Maybe I will remove them maybe just leave them be. I suppose they really aren't hurting anything being there.

    Don
     
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