1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Prius Owners Report More Unintended Acceleration Incidents

Discussion in 'Prius, Hybrid, EV and Alt-Fuel News' started by zenMachine, Aug 13, 2007.

  1. zenMachine

    zenMachine Just another Onionhead

    Joined:
    Mar 3, 2007
    3,355
    300
    0
    Location:
    Texas
    Vehicle:
    2007 Prius
    The Toyota Prius Hybrid continues to generate complaints of unintended acceleration episodes suggesting the possibility of a serious flaw in the vehicle's computer system, electronic controls or software program.

    Toyota service technicians have dismissed the dangerous events as driver error or nothing more than a floor carpet jamming accelerator pedal.

    ConsumerAffiars.Com readers who have experienced these harrowing events disagree.

    http://www.consumeraffairs.com/news04/2007...celeration.html

    (they even misspell their own website's name!) :D
     
  2. Stev0

    Stev0 Honorary Hong Kong Cavalier

    Joined:
    Sep 23, 2006
    7,201
    1,073
    0
    Location:
    Northampton, MA
    Vehicle:
    2022 Prius Prime
    Model:
    Plug-in Base
    Linking to Consumeraffiars (sic).com seriously is like linking to an article in The Onion seriously.
     
  3. ohershey

    ohershey New Member

    Joined:
    May 11, 2007
    632
    2
    0
    Sounds like that other Japanese import... Godzilla.
     
  4. Ichabod

    Ichabod Artist In Residence

    Joined:
    Jul 21, 2006
    1,794
    19
    0
    Location:
    Newton, MA
    Vehicle:
    2006 Prius
    That's a weird, and the article tries to paint a bleak picture by describing at least 3 different and seemingly unrelated scenarios:

    1. The dude who ran his car into a gas station, a story about which there were conflicting reports as to the cause... driver error didn't seem to be ruled out though.

    2. Lunge when braking on rough terrain. I've experienced this, and it's a little disconcerting but has never seemed very dangerous. Is this a Prius issue or a general traction control issue? Seems to me like TCS, ABS and the switch from regen to friction all have to happen at once to get this...

    3. Cruise control losing control?
     
  5. JimN

    JimN Let the games begin!

    Joined:
    Nov 26, 2006
    7,028
    1,116
    0
    Location:
    South Jersey
    Vehicle:
    2010 Prius
    Model:
    V
    <div class='quotetop'>QUOTE(Mad Hatter @ Aug 13 2007, 02:28 PM) [snapback]494822[/snapback]</div>
    Maybe a rampaging herd of Prius knocked over the Minnesota bridge.

    Shouldn't discussion about this website be in FHOP?
     
  6. okiebutnotfrommuskogee

    okiebutnotfrommuskogee Senior Member

    Joined:
    Mar 2, 2007
    1,813
    15
    0
    Location:
    Tulsa, OK
    Vehicle:
    2011 Prius
    Model:
    Two
     
  7. Fibb222

    Fibb222 New Member

    Joined:
    Apr 25, 2006
    1,499
    99
    0
    Location:
    Canada
    Vehicle:
    2004 Prius
    Several months ago, in the space of two weeks, my car took off twice at a high rate of acceleration without my foot being on the pedal - I assumed it was because of the extra floor mat I put in. I moved it back a bit and it never happened again. So I think it was the mat.
     
  8. dogfriend

    dogfriend Human - Animal Hybrid

    Joined:
    Feb 26, 2007
    7,512
    1,188
    0
    Location:
    Carmichael, CA
    Vehicle:
    2007 Prius
    <div class='quotetop'>QUOTE(JimN @ Aug 13 2007, 11:37 AM) [snapback]494832[/snapback]</div>
    Now that you mention it, there was a silver one on top of the road deck after the bridge collapsed. Do you suppose it was the "straw that broke the camel's back"? Someone should alert Consumer Affiars (sic) don't you think? :p :lol:
     
  9. Prius2004Mass

    Prius2004Mass New Member

    Joined:
    Sep 13, 2007
    4
    0
    0
    I have had my 2004 Prius (which I bought used) for about 4 months. I notice that when I am coming to a stop when coming down a hill (like at a traffic light) that the car accelerates forward a bit even though my foot is off the gas. I have started to anticipate this and isn't as much of a prorblem but it took some getting used to.
    Anyone have similar probelm? <_<
    I read the Consumer reports-- I have not experienced that type of acceleration on the highway--where I do most of my driving (2,000 miles a month).
     
  10. fairclge

    fairclge Member

    Joined:
    Mar 18, 2007
    151
    1
    0
    Location:
    Virginia Beach
    Vehicle:
    2007 Prius
    <div class='quotetop'>QUOTE(Prius2004Mass @ Sep 14 2007, 08:06 AM) [snapback]512437[/snapback]</div>
    This pure speculation on my part but what you describe is something that I have noticed.
    I think there is a slight acceleration while lightly braking around 10-15 MPH. This acceleration may be caused when the electric motor is re-generating power and adding resistance and acting as the main stopping force. While slowing down above 15MPH the disk brakes are minimally working. At some point around 10-15 MPH the electric motor stops working as the main stopping force and that’s when I think we feel a slight acceleration. At this point we have to apply more force on the brake peddle and engage the disk brakes to completely stop the car.
    Naturally this is a best guess on my part, but I did sleep in a Holliday-Inn last night. :blink:
     
  11. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    45,024
    16,244
    41
    Location:
    Canada
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    <div class='quotetop'>QUOTE(Prius2004Mass @ Sep 14 2007, 05:06 AM) [snapback]512437[/snapback]</div>
    The "acceleration" is actually the switch btwn regenerative braking and the actual brake pads clamping onto the rotors. It feels like it's accelerating but it's really just "giving" for a split second as it switches over.
     
  12. Jeannie

    Jeannie Proud Prius Granny

    Joined:
    Apr 24, 2006
    1,414
    2
    0
    Location:
    Central New Jersey
    Vehicle:
    2006 Prius
    <div class='quotetop'>QUOTE(Prius2004Mass @ Sep 14 2007, 08:06 AM) [snapback]512437[/snapback]</div>
    Consumer Reports is a reputable magazine from a reputable organization. The source cited in the original post is Consumer Affairs, which seems to have a 'thing' against the Prius, and has in the past printed and spread other anti-Prius reports, including the infamous 'Hummer is more environmentally friendly than the Prius' report that has been debunked many times. (Just FYI, since Consumer Affairs seems to rely on people mistaking them for Consumer Reports.)
     
  13. Neicy

    Neicy Member

    Joined:
    Apr 29, 2007
    834
    19
    0
    Location:
    Wakefield, MA.
    Vehicle:
    2021 Prius Prime
    Model:
    XLE
    Agreed. For the real scoop read the NHTSA site. If there's something to it, it will be listed there. Also this is an old article that's been cited before.
     
  14. NoMoShocks

    NoMoShocks Electrical Engineer

    Joined:
    Jan 21, 2007
    1,292
    82
    11
    Location:
    Camas, WA
    Vehicle:
    2010 Prius
    Model:
    IV
    I think it would be interresting, if someone has the time and energy, to fabricate a similar story and report it to Cansumer Affairs as a test to see how thouroughly they follow up on the stories. To do this, I think you would have to put up with a short phone call back from them, but I bet they would take whatever you offer at face value, and offer to represent you in a lawsuit.
     
  15. subarutoo

    subarutoo New Member

    Joined:
    Jan 18, 2006
    1,213
    23
    0
    Location:
    Chatsworth, CA
    Vehicle:
    2006 Prius
    Maybe the fix for unintended accel is to reroute the windshield washer to spray the front tires with water, invoke the killer TC, and stop the car. Every time I try to accelerate (intended) on a wet street, Momma TC clicks on, and shuts everything down. If it works for intended accel it might work for unintended as well. Just a thought
     
  16. Prius2004Mass

    Prius2004Mass New Member

    Joined:
    Sep 13, 2007
    4
    0
    0
    <div class='quotetop'>QUOTE(Prius2004Mass @ Sep 14 2007, 08:06 AM) [snapback]512437[/snapback]</div>
    Your explanation makes sense--but I won't let my 17 year old drive the car by himself yet. He needs to experience this and know how to react. It does seemd to be tied to the braking. Thanks- I am glad I am not crazy... this is something that new owners should be aware of.
     
  17. DaveinOlyWA

    DaveinOlyWA 3rd Time was Solariffic!!

    Joined:
    Apr 13, 2004
    15,140
    611
    0
    Location:
    South Puget Sound, WA
    Vehicle:
    2013 Nissan LEAF
    Model:
    Persona
    i for one have experienced the carpet covering the accelerator pedal incident and it did freak me out... but after i realized what it was... i had a pretty good laugh over it...

    i personally think the "flaw" was designed in by the engineers as just another reminder on the benefits of conservative driving since this can only happen when the pedal is floored.
     
  18. Stev0

    Stev0 Honorary Hong Kong Cavalier

    Joined:
    Sep 23, 2006
    7,201
    1,073
    0
    Location:
    Northampton, MA
    Vehicle:
    2022 Prius Prime
    Model:
    Plug-in Base
  19. FL_Prius_Driver

    FL_Prius_Driver Senior Member

    Joined:
    Jun 17, 2007
    4,319
    1,527
    0
    Location:
    Tampa Bay
    Vehicle:
    2010 Prius
    Model:
    I
    How many remember the hammering Audi took for the same speculation? Nothing was ever found, but Audi sales took a beating that was permanent.

    The only thing good about the whole (unintentional acceleration) scam was the joke:

    What is the worst spot on the highway?

    Behind a Pinto and in front of an Audi.
     
  20. mrg

    mrg Member

    Joined:
    May 14, 2006
    125
    0
    0
    All the comments I have recalled hearing about Cunsumer Affairs has been about incorrect imformation that they report. I see not reason to believe they will start reporting the truth any time soon.