Results 1 to 11 of 11

Thread: Knocking noise coming from back of car.

  1. #1
    Jr Member Bean's Avatar
    Join Date
    Jan 2007
    Posts
    926
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Knocking noise coming from back of car.

    Hi All

    Was sitting in my car in my driveway today and heard a knocking/banging sound coming from the back of the car. The car doesnt have to be moving for me to hear this.

    Am wondering if it could be the fuel pump? Anyone had theirs go on them and if so, what noises did it make before it went?

    Thanks Guys
    Aint want no Rustbuckets Here!!!

  2. #2
    Newbie
    Join Date
    Dec 2009
    Age
    24
    Posts
    156
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Knocking noise coming from back of car.

    is it coming from under the back seat area? that's were the fuel pump is. Imo i think its the muffler knocking ?

  3. #3
    Jr Member Bean's Avatar
    Join Date
    Jan 2007
    Posts
    926
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Knocking noise coming from back of car.

    Yes. The back seat area.

    Why would the Muffler start to knock after 92 K?

  4. #4
    Newbie rgray's Avatar
    Join Date
    Jun 2010
    Location
    Toronto
    Posts
    60
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Knocking noise coming from back of car.

    Quote Originally Posted by Bean View Post
    Was sitting in my car in my driveway today and heard a knocking/banging sound coming from the back of the car. The car doesnt have to be moving for me to hear this.
    Obvious solution: let the guy out of the trunk.
    2010 Mazda 3 Sport GT w/ Moonroof Black Mica

    Enkei EKM3 18" x 7.5 w/ Nankang NS2 | Racing Beat Exhaust | Racing Beat Rear Sway Bar | Corksport LED Interior Lighting Kit | VG Shark Fin Antenna | Axela Badge | Rho-plate | LED Interior Lights

  5. #5
    Jr Member Bean's Avatar
    Join Date
    Jan 2007
    Posts
    926
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Knocking noise coming from back of car.

    LOL

    My daughter said the exact same thing

  6. #6
    Jr Member
    Join Date
    Oct 2009
    Posts
    255
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Knocking noise coming from back of car.

    Fuel pump might make a clicking sound or pumping sound but not a knocking i dont think. Could me the muffler like 07m3gt said. If u lean under the car you will see that it is held up by a rubber hanger type hook. Check to see if its crapped out or if its still holding up. Its normal for the muffler to wobble a bit but make sure its not like dangling in the air. Thats really all i can think of when it comes to rattling from the back..
    Look under the car while its running see if you can spot something

  7. #7
    Jr Member Bean's Avatar
    Join Date
    Jan 2007
    Posts
    926
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Knocking noise coming from back of car.

    Okay. Will have a look tomorrow

  8. #8
    Member SonicBoy's Avatar
    Join Date
    Aug 2006
    Posts
    1,974
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Knocking noise coming from back of car.

    Is your tank full or near half? Could just be the Gas sloshing around in the Tank when you move around back there.

    Maybe you should be taking those activities elsewhere so you don't get the noise.

  9. #9
    Jr Member Bean's Avatar
    Join Date
    Jan 2007
    Posts
    926
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Knocking noise coming from back of car.



    Just my daughter and I were in the car at the time. It doesnt sound like the gas by the way. Have heard that before

  10. #10
    Sr Member Zoom Zoom Boy's Avatar
    Join Date
    Aug 2008
    Posts
    4,070
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Knocking noise coming from back of car.

    Probably just a loose heat shield. Could also be from the muffler.
    - Courtesy of Unoriginalusername
    "Friends don't let friends, apex early."- unknown
    2008.5 Black Mica Mazdaspeed3
    2005 Titanium Grey, 5spd, GT Sport Hatch

  11. #11
    Sr Member
    Join Date
    Sep 2005
    Age
    26
    Posts
    4,627
    Thanks
    0
    Thanked 12 Times in 11 Posts
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Knocking noise coming from back of car.

    What happened to my old 3 was the exhaust hangers were geting weak so i replaced all the bushings for the exhaust system and the banging stopped. Or it could be a stab link
    1991 Nissan Pathfinder SE-V6 Red/red interior - trade in
    2005 Mazda 3 GX ty grey/black interior - Write off
    2010 Mazda 3 GT E sedan Crystal White Pearl/on black interior- trade in
    2010 Speed 3 Crystal White Pearl/on black interior all options- current

Similar Threads

  1. Loud noise coming from one of the wheels
    By artysta in forum Problems with the Mazda3
    Replies: 7
    Last Post: 03-29-2010, 05:09 PM
  2. knocking/creaking noise coming from hatch area
    By Xerox in forum Problems with the Mazda3
    Replies: 3
    Last Post: 05-22-2009, 03:24 PM
  3. Noise coming from the front of the car (not engine)
    By Ana144 in forum Problems with the Mazda3
    Replies: 5
    Last Post: 12-10-2008, 11:34 AM
  4. Clicking noise coming from vents
    By stealthman12 in forum Problems with the Mazda3
    Replies: 0
    Last Post: 10-04-2007, 11:06 PM
  5. rattling NOISE coming from the trunk
    By BBGundam in forum Problems with the Mazda3
    Replies: 11
    Last Post: 12-12-2006, 07:56 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •