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Issues with 575F1 revving when coming to a stop

Discussion in '456/550/575' started by Ozeskiman, Jun 13, 2020.

  1. Ozeskiman

    Ozeskiman Karting

    May 15, 2016
    50
    Melbourne
    Full Name:
    Tony
    Can anyone help on this issue. On 3 recent occasions when I have been coming slowly to a full stop the engine has tried to accelerate. I have immediately put the car in neutral and I can watch the rev counter running up and down to 3,000 rpm. It's not smooth but jumps about. I have then turned the car off, then restarted but the issue remained whilst I have the brake on. As soon as I take off the issue disappears. It's a little disconcerting.
    I spoke to the local Ferrari dealer. They suggested it could possibly be sticking butterflies in the air intake. But as it's random there's no way of checking. No lights came on, so they doubt the computers will show anything. Has anyone else experienced this? Any ideas, solutions? Appreciate anyone's thoughts on this.
     
  2. Qavion

    Qavion F1 Rookie

    Feb 20, 2015
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    Ian Riddell
    #2 Qavion, Jun 13, 2020
    Last edited: Jun 13, 2020
    Wouldn't sticking butterflies keep the rpms constantly high (once stuck)?

    Could it be a faulty idle speed regulator (assuming the 575 has one)?
     
  3. Qavion

    Qavion F1 Rookie

    Feb 20, 2015
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    Ian Riddell
  4. NoECUs

    NoECUs Rookie
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    Mar 13, 2005
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    William Harrod
    I had a throttle problem with my 575 - it sometimes wouldn't return to the normal idle speed and instead would idle fast enough to want to engage the clutch. Turns out it was a faulty accelerator potentiometer in which the two halves of the circuit would not sync properly with the ECU. You can try turning off the battery and resetting the ECU - if the problem goes away for a while, then this is probably your issue.
     
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  5. Konadog06

    Konadog06 Formula Junior
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    Aug 22, 2007
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    Daytona Beach, Florida
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    Bill
    In my case the issue with this symptom was a leaking intake gasket. If it has never been changed it’s a good possibility. The replacement gasket I believe is better material and will solve the problem if it is in fact your problem.
    Bill
    FL
     
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  6. tazandjan

    tazandjan Three Time F1 World Champ
    Owner Lifetime Rossa

    Jul 19, 2008
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    Terry H Phillips
    Tony- Quite often this problem is pretty simple, hitting the throttle pedal at the same time you are braking. Ferrari noted a problem with this on early 575Ms and increased the distance between throttle and brake pedals by moving the brake pedal over one set of holes. This increased clearance between the pedals from 35 mm to 55 mm, documented below at AN 50297 around May/June 2003.
     

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  7. Konadog06

    Konadog06 Formula Junior
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    Aug 22, 2007
    867
    Daytona Beach, Florida
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    Bill
    Tony you might clarify if this is happening randomly or on the last three occasions you’ve driven the car? And you say once you take off it disappears. Does it disappear until you come to another stop or not reoccur?
    In the case of a intake vacuum leak, usually once it starts happening it doesn’t go away.
    Bill
     
  8. Ozeskiman

    Ozeskiman Karting

    May 15, 2016
    50
    Melbourne
    Full Name:
    Tony

    Thanks to everyone for their thoughts. I will see what happens and then at least have some ideas if it happens again. Drove the car yesterday and it didn't occur. Taz, your suggestion on hitting both pedals at the same will make me be more conscious to notice if that's the case if it happens again. Strangely enough I was wearing normal brogues rather than moccasins when it last occurred. You are a wealth of information. :)
     
  9. tazandjan

    tazandjan Three Time F1 World Champ
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    Tony- All I wear now are driving shoes for everyday wear. Have about 8 pairs and just rotate them. Helps to finally be retired, but the driving shoes really help on the pedals, even with F1.
     
  10. Ozeskiman

    Ozeskiman Karting

    May 15, 2016
    50
    Melbourne
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    Tony
    Thanks Taz. I usually wear driving shoes. I have around 50 pairs in all colours. But I don't think that was the issue. So far it hasn't happened again.
     
  11. tazandjan

    tazandjan Three Time F1 World Champ
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    Tony- 50 pairs? You must have a huge closet to soak up all of those. Mine are all varying shades of brown and black leather.
     
  12. Ozeskiman

    Ozeskiman Karting

    May 15, 2016
    50
    Melbourne
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    Tony
    I know..I just keep buying them when I'm in Europe. It's tragic :)
     
  13. 308 GTB

    308 GTB F1 Veteran
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    Feb 7, 2002
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    Barry Wolinsky
    I haven't had 50 pairs of shoes throughout my entire life. :)
     
  14. tazandjan

    tazandjan Three Time F1 World Champ
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    Jul 19, 2008
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    Terry H Phillips
    Barry- Likely true for me, too. For much of my life I had two pairs, one civilian and one military. Before that it was just one pair at a time, not counting the one pair of tennis shoes.
     

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