User Tag List

Thanks Thanks:  0
Likes Likes:  0
Results 1 to 5 of 5

Thread: Ticking/Tapping noise under low rpm load

  1. #1
    Regular Member spatch's Avatar
    Join Date
    Aug 2007
    Location
    Kent
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default Ticking/Tapping noise under low rpm load

    Driving along the other day with the window down and as I overtook a cyclist I noticed a ticking(tapping) noise under acceleration.

    I tested it further and I have found that if I accelerate from about 1000rpm with my foot fairly well down on the pedal, there is a ticking/tapping until the turbo begins to spin up - about 1500rpm. If I do not load up the pedal too much it does not do it. If I put my foot down hard with the revs slightly higher (say 1500rpm) it does not do it.

    Doesnt seem to make a difference if hot or cold.

    Lastly, the noise speeds up with the engine and the frequency seems to tie in with the engine speed (but RPM/2). What I mean here is that the noise seems to occur every time a cyclider would go through an action eg a power stroke or exhaust stroke or fuel injection.

    Any ideas?

    Cheers,
    Mark

  2. #2
    Regular Member Gsi3.2's Avatar
    Join Date
    Jul 2005
    Location
    Technical directors office
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    it's just diesel knock...not an issue if it goes away when the tubo boosts and it's only happening under low RPm load..

  3. #3
    Ex Vec-C Admin Stevel's Avatar
    Join Date
    Nov 2006
    Location
    Chester
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    Have you checked for a cyclist under the car.

  4. #4
    Regular Member spatch's Avatar
    Join Date
    Aug 2007
    Location
    Kent
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    Quote Originally Posted by Gsi3.2 View Post
    it's just diesel knock...not an issue if it goes away when the tubo boosts and it's only happening under low RPm load..
    Thanks, possible I suppose, but why do I only seem to get the noise from a single cyclinder (perhaps I did not make that very clear). The frequency of the noise corresponds with just one cyclinder making it, not all six. If it was diesel knock would I not get it from all six??

    Cheers,
    Last edited by spatch; 9th May 2008 at 11:22.

  5. #5
    Regular Member spatch's Avatar
    Join Date
    Aug 2007
    Location
    Kent
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    Quote Originally Posted by Stevel View Post
    Have you checked for a cyclist under the car.
    Thats definately not the cause, she is in the airbox. That reminds me, I must clean the air filter soon.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Z28NET tapping under load.
    By Hyperhart in forum Engine & Drivetrain
    Replies: 7
    Last Post: 28th November 2012, 16:04
  2. tapping and ticking noises ?
    By djlee in forum Engine & Drivetrain
    Replies: 1
    Last Post: 17th March 2012, 13:17
  3. tapping noise
    By luke.oldham in forum Engine & Drivetrain
    Replies: 0
    Last Post: 2nd March 2010, 11:50
  4. V6 Ticking/ Tapping noise
    By D18 in forum Engine & Drivetrain
    Replies: 8
    Last Post: 5th November 2008, 19:02
  5. Tapping noise at 60-70 mph.
    By Andrew Hambridge in forum Petrol Engine related
    Replies: 4
    Last Post: 31st July 2007, 15:00

Visitors found this page by searching for:

Nobody landed on this page from a search engine, yet!

Bookmarks

Posting Permissions

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