1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

engine shuts off in a weird way

Discussion in 'A3/S3/Sportback (8P Chassis)' started by khalil, Jan 17, 2012.

  1. khalil
    Offline

    khalil Member

    Joined:
    Apr 21, 2006
    Messages:
    769
    Likes Received:
    0
    hi all its been a while since i posted,
    i have a little problem with my 2.0 tdi 140, when i switch off the engine it shuts off with a weird noise, before it used to shut off smooth but now it shuts off with a rattle,

    so far had the flywheel and clucth done but that made no difference to that problem,

    any ideas guys?
    #1
  2. Johnny Bravo
    Offline

    Johnny Bravo 6+1 Gears

    Joined:
    Jun 14, 2009
    Messages:
    807
    Likes Received:
    1
    Do you have any error light on?
    This may occur if the cut-off flap is malfunctioning.
    #2
  3. khalil
    Offline

    khalil Member

    Joined:
    Apr 21, 2006
    Messages:
    769
    Likes Received:
    0
    thanks for the reply, no there is no error on the dash,

    or does a tdi shut off that way?
    #3
  4. warren_S5
    Offline

    warren_S5 Moderator Staff Member Moderator

    Joined:
    Oct 31, 2007
    Messages:
    7,176
    Likes Received:
    11
    Does the rattle sound metallic?

    Engine mounts or exhaust (heat shield or mounting brackets). Take it no tools have been left anywhere ;-)
    #4
  5. khalil
    Offline

    khalil Member

    Joined:
    Apr 21, 2006
    Messages:
    769
    Likes Received:
    0
    yes mate it does sound metallic,

    you think it can be the "motor intake manifold flap"?
    #5
  6. c_w
    Offline

    c_w Active Member

    Joined:
    Feb 23, 2010
    Messages:
    1,058
    Likes Received:
    1
    The TDI usually has a rattlesnake noise on shut-down when some kind of solenoid shuts off.
    #6
  7. khalil
    Offline

    khalil Member

    Joined:
    Apr 21, 2006
    Messages:
    769
    Likes Received:
    0
    i am sure when i used to switch it off before it used to be smooth, now when i turn the car off it sound like it cuts off instantly if that makes any sense
    #7
  8. Clover001
    Offline

    Clover001 New Member

    Joined:
    Jul 30, 2011
    Messages:
    26
    Likes Received:
    0
    Alot of the TDI engones make this sort of noise when shut off, if theres no light on the dash i wouldnt of said it was anything serious, u nless it really bothering you, think mine makes a rattling noise when shutting off
    #8
  9. AidenUK
    Offline

    AidenUK Active Member

    Joined:
    May 27, 2009
    Messages:
    1,647
    Likes Received:
    3
    Mine does the same, always has, just had the cam belt changed and it's still there. No warning lights so I'm not bothered really as it would be like searching for a needle in a haystack!
    #9
  10. khalil
    Offline

    khalil Member

    Joined:
    Apr 21, 2006
    Messages:
    769
    Likes Received:
    0
    thanks all, i think its is normal after all, had it checked by a mechanic, say its normal for a diesal
    #10
  11. NHN
    Offline

    NHN Modmetractor Site Sponsor

    Joined:
    Jan 14, 2008
    Messages:
    27,220
    Likes Received:
    29
    So holding clutch in whilst shutting car down doesnt make any difference?

    Also try gradual like pedal held in halfway.

    If its the IMF, then its more than likely the teeth have broken inside if its the older plastic version, which I guess could make a noise if its loose as such & wavering on the motor if that makes sense.
    #11
  12. khalil
    Offline

    khalil Member

    Joined:
    Apr 21, 2006
    Messages:
    769
    Likes Received:
    0
    when i have the clutch down and than switch it off it still the same,

    how would i know if it is the IMF, wouldnt that throw the engine light on the dash?
    #12
  13. NHN
    Offline

    NHN Modmetractor Site Sponsor

    Joined:
    Jan 14, 2008
    Messages:
    27,220
    Likes Received:
    29
    Not neccessarily mate, if its working but missing some teeth then it maybe wont throw a fault as effectively the car still sees a working flap as such, its speculative as we not there to hear the noise.
    #13
  14. khalil
    Offline

    khalil Member

    Joined:
    Apr 21, 2006
    Messages:
    769
    Likes Received:
    0
    if i was to take off the big black hose, would i be able to see if the flap is working?, or would i need to take off the IMF?(believe its held by 3 bolts)
    #14
  15. NHN
    Offline

    NHN Modmetractor Site Sponsor

    Joined:
    Jan 14, 2008
    Messages:
    27,220
    Likes Received:
    29
    I guess you could do this yes mate with a torch momentarily.
    #15
  16. khalil
    Offline

    khalil Member

    Joined:
    Apr 21, 2006
    Messages:
    769
    Likes Received:
    0
    thanks mate, one last thing, the flap it should move smoothly? how would i be able to tell if there is a problem within the flap, ie should i get someone to turn the engine off while i take or look? or is that a no no
    #16
  17. Johnny Bravo
    Offline

    Johnny Bravo 6+1 Gears

    Joined:
    Jun 14, 2009
    Messages:
    807
    Likes Received:
    1
    This would be the best way.
    #17
  18. khalil
    Offline

    khalil Member

    Joined:
    Apr 21, 2006
    Messages:
    769
    Likes Received:
    0
    this morning i undid the black hose, put i mirrror to see is the flap was open or closed, but i found that the flap was open(engine shut), you guys think thats the problem i am having with the wierd cut off?
    #18
  19. khalil
    Offline

    khalil Member

    Joined:
    Apr 21, 2006
    Messages:
    769
    Likes Received:
    0
    just a update,
    i did pull out the black hose, tried to move the flap, which seems stuck, after that put the hose back on and the motor on the IMF made a loud ticking noise when i switched the engine on for few seconds, luckly i have warranty so had it replaced, now it shuts off smooth again,

    thanks to all that help, cheers
    #19
  20. warren_S5
    Offline

    warren_S5 Moderator Staff Member Moderator

    Joined:
    Oct 31, 2007
    Messages:
    7,176
    Likes Received:
    11
    Interesting, mine made this ticking on my last S3, must have been this flap.

    Really pleased you've got it sorted khalil.
    #20
  21. NHN
    Offline

    NHN Modmetractor Site Sponsor

    Joined:
    Jan 14, 2008
    Messages:
    27,220
    Likes Received:
    29
    Cool glad to see a successful fix.
    #21

Share This Page