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

Acceleration rattle

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by robjohn, Jan 3, 2010.

  1. robjohn

    robjohn New Member

    Joined:
    Jan 3, 2010
    3
    1
    0
    Location:
    ottawa
    Vehicle:
    2010 Prius
    Model:
    III
    After a good look through the threads, I think I have a problem no one else has discussed (I also have the annoying braking problems, front and back, discussed elsewhere, but that isn't my present gripe.)
    Today, when I put my foot on the gas pedal, I heard a rattle. Seems to be in the engine, and I would say it is a rattle, not a knock. Anyone else experience such a problem?
     
  2. F8L

    F8L Protecting Habitat & AG Lands

    Joined:
    Aug 14, 2006
    19,011
    4,081
    50
    Location:
    Grass Valley, CA.
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    Hopefully you didn't get a tank of bad gas. A rattling sound can be preignition. It sounds sorta like a can of marbles being swirled around.

    Did this just start having this problem and/or did you recently fill up?
     
  3. Spartane

    Spartane Member

    Joined:
    Jun 4, 2009
    149
    43
    0
    Location:
    Mississauga, Canada
    Vehicle:
    2010 Prius
    Model:
    III
    Open your hood and check the rod that's used to hold it open. If it's not clamped properly in place, apparently it can cause a rattle.
     
  4. a64pilot

    a64pilot Active Member

    Joined:
    Aug 3, 2008
    771
    62
    0
    Location:
    Albany Ga.
    Vehicle:
    2010 Prius
    Model:
    III
    Bingo,
    last time someone reported what your describing, that was the problem
     
  5. robjohn

    robjohn New Member

    Joined:
    Jan 3, 2010
    3
    1
    0
    Location:
    ottawa
    Vehicle:
    2010 Prius
    Model:
    III
    Thanks to all. In fact it was the rod that opens the hood. Note to self: open hood and have a look before asking for help.
     
    1 person likes this.
  6. DeanFL

    DeanFL 2010 owner - 1st Prius

    Joined:
    Apr 13, 2009
    1,015
    355
    0
    Location:
    Leesburg Florida USA
    Vehicle:
    2010 Prius
    Model:
    V
    This topic hit my 1+ year old Gen III. It's been pretty much free of rattles - of course squeezing the console bridge or touching plastic dash areas brings out creaks and such.

    But, yesterday - out of the blue, a buzz when accelerating. Not a definitive pattern, but definitely relates to normal car vibrations - ie when the ice is operating. Typically starts between 20-25mph. Is a buzz, not creak or rattle. And can increase in pitch, perhaps with more car vibration. It is definitely located in the passenger side dash - almost like where the air bag is located.

    I have removed EVERYTHING out of the glove boxes, sunglass holder, and door pockets. Have taken the lower box completely out and taken test drives. Has nothing to do with radio or A/C - both off. Checked the hood prop rod. All the typical fixes tried that have been noted here.

    It was buzzing just now in Park with the ICE on. The buzz sound can fluctuate and sounds more like marbles on a pie plate (of course not THAT loud, but that muffled type of sound). Again definitely from the middle of the internal pass dash area.
    Going on a 2 hour trip tomorrow - will have the other person drive and I'll try to better diagnose. I HATE creaks/buzzes/rattles in a car. Just makes the thing feel cheap. Hope this isn't a sign of the future... the dash plastics and assembly has me concerned for ongoing noises as the car ages.

    Any ideas or anyone else have/had this buzz?
     
  7. DeanFL

    DeanFL 2010 owner - 1st Prius

    Joined:
    Apr 13, 2009
    1,015
    355
    0
    Location:
    Leesburg Florida USA
    Vehicle:
    2010 Prius
    Model:
    V
    RETRACTION from below.
    I come back embarrassed. The buzz problem came on suddenly; and I was quite upset as I hate rattles and noises in new(er) cars. It was close to maddening. And as I said I had looked at and tried everything learned by others on the site.

    Thought I'd look under the hood once again. Yep that darn hood proprod is up and snapped. Nothing loose around the wiper area.

    By chance, I looked down at the front passenger side near the parking light. And touched the air inlet hose. It moved... And the mounting bracket was loose. Bottom line, I had re-replaced LED lamps in the parking lights a couple days ago. Apparently when I reinstalled the air inlet hose assembly, I put the mounting plate on the wrong side of the hex screw. Tightened the screw, but the plate was just hangin' loose on the nut. I installed correctly - and thought OMG if THAT was the problem.... It was. The source of the buzz was about 3' in front from where it sounded - in the passenger dash area. Took it for a ride, and quiet. Now I see how the prop rod can reverberate and sound like a dash rattle too.
    So the problem was caused by...me. Sorry Toyota for all the %$&*@# things I called you. Never mind. :eek:


     
  8. spiderman

    spiderman wretched

    Joined:
    Jul 5, 2009
    7,543
    1,558
    0
    Location:
    Alaska
    Vehicle:
    2010 Prius
    Model:
    II
    ^ Glad you figured out! :)