Sky InsuranceVolks Autos
Results 1 to 36 of 36
Like Tree4Likes
  • 1 Post By A4sportMrT
  • 2 Post By A4sportMrT
  • 1 Post By A4sportMrT

Thread: High pitched scream under boost

  1. #1
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254

    High pitched scream under boost

    Hello all, there is a high pitch scream when i accelerate under boost, It's not there when I rev stationary.

    the only thing I've done, is I was going to swap out standard air box for the K&N induction kit but I couldn't get the bugger out after taking off hoses, undoing screws, wiggling it etc but that's another story I'll be wanting help with.

    anyway could it be that I've not put something back right? Or have I damaged something? *please do not say anything Turbo related*

    the car still drives fine it just has an annoying squeal when accelerating hard.

    thanks in advance

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    quattrojames's Avatar
    Moderator

    Status
    Offline
    Join Date
    Mar 2008
    Location
    Dorset
    Posts
    13,856

    My Social Networking

    Follow quattrojames On Twitter Add quattrojames on Facebook
    Boost leak?
    Ingolstance Read about my A6 HERE.

  4. #3
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    Could be, I will try to identify and check hoses tomorrow.
    Hope it is something simple and not expensive

  5. #4
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    Ok I've checked to make sure the airbox is sitting in the right position, checked intake hose and the pipe next to it. And the noise is still there.

    I'm going to double check airbox is sitting right. But I'm gonna try and remove the airbox completely and fit the K&N
    I'll have to wait until weekend when I've got the time and some daylight.

  6. #5
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    Also another note to add, the noise is definitely there when I rev the car sitting stationary, and when travelling changing gear from 1st up to 4th, being a constant 'note' until I let off the throttle
    BRILLO likes this.

  7. #6
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    I've fitted the air filter and the noise is still there, so I'm guessing there is a boost leak somewhere. But have no idea how to check this, will vcds tell me that there is a boost leak?

  8. #7
    AlexGSi2000's Avatar
    5th Gear

    Status
    Online
    Join Date
    Feb 2012
    Location
    Liverpool
    Posts
    1,146
    VCDS may be able to tell you when logging requested boost against actual boost?
    There is lots of inter-cooler pipework around the front bumper area - could be something as simple as a loose clamp.

    Inter-coolers are sometimes prone to splitting at the top - where the plastic meets the core.

    2002 A4 Avant Quattro Sport 2.5 V6 TDi - 219Bhp - Votex
    BCS Automotive Turbo-Back - Remap -
    19" RS6 Reps - B6 S4 Brakes - Symphony II+
    - Weitec GT
    - 2001 Honda CBR600-FS1 -

  9. #8
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    Ok cheers, I'll have a closer look and check most visible pipe work.

    As far as I'm aware I'm not losing anything but there is a definite whistle

  10. #9
    Neutral

    Status
    Offline
    Join Date
    Nov 2012
    Posts
    52
    Get a smoke test visually you can check for big splits so have a good check over first but its the small hard to get a splits that can cause the problem. Any good tuner/mechanic should have a smoke machine to test it should cost no more than £20.

  11. #10
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    Will have a look and see what's available around East Sussex, closer the better but don't mind travelling

  12. #11
    Neutral

    Status
    Offline
    Join Date
    Sep 2013
    Posts
    33
    if you fitted K&N filter you will have hissing sound. The standard air filter is also sound insulator.

  13. #12
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    It was there before, when I first tried to remove the standard airbox. Couldn't do it so put everything back on. That's when the noise started. So it's got to be something I've done

  14. #13
    6th Gear

    Status
    Offline
    Join Date
    May 2012
    Location
    RETFORD, NOTTS
    Posts
    1,748
    ive got similar on my tdi. can only be heard when initially revving on the spot, or a little when driving.

    Its not boost im sure of this now, last time i had a boost leak there was black smoke and the whoosing was more evident on no throttle between gears etc.

    Ive had an issue before with a loose inlet manifold. havin it smoke tested shortly and will see what we shall see...
    '02 TDi 130 Sport: Mods to date: BXP 160 conversion, EGR delete, Decat, Helix SMF fast road clutch, 312mm front rotors, full DIS , CC, Xenons.
    VCDS fully registered and happy to help.
    *Need a Spare Key or Remote? SKC retrieval? Clock/ECU swap or milage correction? I am fully insured to work on your vehicle! Offering a good deal and quality service to ASN members Nationwide!*

  15. #14
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    If it is a boost leak, gives me a good excuse to upgrade to Samco hosing.

    Still trying to find a mechanic who has the equipment for smoke test

  16. #15
    6th Gear

    Status
    Offline
    Join Date
    May 2012
    Location
    RETFORD, NOTTS
    Posts
    1,748
    Woot, mine was loose and missing manifold bolts. Smoke test was good to confirm no leaks, vcds already told me this on the way there mind. But he did spot the missing bolts. Local halfrauds auto centre ere happy to add a nut and tighten them all up for a beer, good stuff.
    '02 TDi 130 Sport: Mods to date: BXP 160 conversion, EGR delete, Decat, Helix SMF fast road clutch, 312mm front rotors, full DIS , CC, Xenons.
    VCDS fully registered and happy to help.
    *Need a Spare Key or Remote? SKC retrieval? Clock/ECU swap or milage correction? I am fully insured to work on your vehicle! Offering a good deal and quality service to ASN members Nationwide!*

  17. #16
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    Glad you got it sorted

  18. #17
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    Found a local garage who can do the test, for £24. Just waiting date to book it in, hopefully this weekend

  19. #18
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    Still have not had car booked in to be seen by a mechanic. I looked yesterday and I can not find any split in any of the pipe work I checked. The only thing I have noticed is oily/greasy stuff on the pipe going too and possibly coming off the re circulator valve. I'm really hoping to get it looked at this Saturday. But just wondered if this is a sign of something.

    Cheers

  20. #19
    Willenium's Avatar
    Neutral

    Status
    Offline
    Join Date
    Nov 2013
    Location
    Herts
    Posts
    38
    I had a weird noise on boost not too long after I bought my car. I could clearly hear it when accelerating and it would come in at about 3400-3500rpm. Hissing/screaming like a banshee kind of sound. No idea what it was as it has since gone away

  21. #20
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    Sounds very similar to what I've got. Only there when engine is under load. So very difficult to find it when your heads under the bonnet.
    Can't get car booked in and getting fed up with the garage now. So I'm gonna attack the problem Saturday.

  22. #21
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    Not had any chance to look more into my problem but searching the net tonight and come across this
    http://youtu.be/Aw6xqtwRH9w

    ^^^ that is the noise I have. Now comments suggest buggered Turbo which I am dreading. But if it is on it's way to the scrap yard would the car still be driving ok (ish) the car feels a little under performed but I have been putting it down to a boost leak.

  23. #22
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    Better video of the noise
    http://youtu.be/kCKmPjS1VNo

  24. #23
    6th Gear

    Status
    Offline
    Join Date
    Jul 2007
    Location
    London
    Posts
    3,211
    Check for loose intake/exhaust manifolds bolts...Also missing tips of the compressor blades will whine like that...
    FOR SALE:
    -Golf mk 5/audi a3 1.6 FSI fuel pump, brand new genuine part boxed + seals
    -audi a3 (1998 to 2003) genuine clutch slave cylinder to fit 1.6 engines BRAND NEW
    -Rear bush press tool to fit new rear axle bushes on Golf Mk3/4, Audi a3/S3, Seat Leon/Toledo, Skoda Octavia mk 1/2 used once

  25. #24
    Jimmy TDI's Avatar
    Pro Tinkerer

    Status
    Offline
    Join Date
    Dec 2013
    Location
    Manchester
    Posts
    374
    That sounds like a damaged turbo to me, especially if your not getting lots of black smoke to suggest a boost leak. You could have knocked something into the intake when wiggling the airbox off.
    Made on the red side of Manchester

  26. #25
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254

    High pitched scream under boost

    Sorry for the delay.
    I've not noticed any thing different smoke wise.

    A few friends of mine have suggested turbo, I couldn't get my head round it, so I've booked it in to the dealers I bought it from. Fingers crossed.

    Oh and warranty run out last week

  27. #26
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    Quote Originally Posted by adamss24 View Post
    Check for loose intake/exhaust manifolds bolts...
    I will have a look this weekend, thank you

  28. #27
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    had a look at the car again and there's a noticeable leak from rocker cover gasket, possibly exhaust manifold (not sure) also there seems to be a loose pipe which connects to intake pipe. Hard to describe but if you move another pipe connected to intake it feels stiffer than the other.

    It's going in tomorrow afternoon and I've marked up a couple of bolts to see if they've looked at what I asked

  29. #28
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    Ok so my turbo needs replacing, garage quoted £700 to send it away be repaired and then fitted back. I don't have that this side of payday. So how easy is it to do it my self? Anybody got any tips, advice or any suggestions?

    Please help

  30. #29
    BRILLO's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Sep 2011
    Location
    Juniper Green, Edinburgh, United Kingdom, United Kingdom
    Posts
    137
    What engine you got?

  31. #30
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    1.8t BFB I think

  32. #31
    BRILLO's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Sep 2011
    Location
    Juniper Green, Edinburgh, United Kingdom, United Kingdom
    Posts
    137
    Don't know how hard it is on 1.8 engine. I think that turbo repair is a bit expensive though. I paid £750 for a genuine brand new one from the motor factors.

  33. #32
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    This is why I immediately turned round and said forget it, I'll pick car up tonight. I thought he was joking, got £80 labour charge to.
    By the looks of it there's 6 bolts and the oil feed pipes. I need to find out which turbo it is first so I can find a replacement.

  34. #33
    S4_dan's Avatar
    Fire up the Quattro!

    Status
    Offline
    Join Date
    Jan 2006
    Location
    Somewhere in the Howardian Hills!
    Posts
    1,566
    2002 2.5 V6 Quattro
    Mods Done: Q5 Rear aero wiper. Front ambient light install. Led number plate lens. Towbar with 13pin electrics.
    Mods to complete: Sport shocks to go with Eibach pro springs. Fit 17" 5 star matt black wheels. Fix lack of torque at low revs. Get a custom exhaust system fitted.

    FOR SALE - Eibach Pro Sport springs for a 2.5 V6 B6/7 PM ME.

  35. #34
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    Quote Originally Posted by S4_dan View Post
    Worth the additional 15 horses??
    S4_dan and BRILLO like this.

  36. #35
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    All fixed now, 3/4 damaged fins was the problem
    Although there was sludge in one of the black solid pipes so will need to sort that out
    Last edited by A4sportMrT; 1st February 2014 at 20:44.
    S4_dan likes this.

  37. #36
    1st Gear

    Status
    Offline
    Join Date
    Oct 2013
    Location
    East Sussex
    Posts
    254
    The sludge in pipe has been playing on my mind, and not sure what the appropriate steps in solving the problem are. The car is running fine and had oil change back in July so is it wise to get the issue sorted now? I've had no warning lights come on

 

 

Similar Threads

  1. High pitched noise when on high boost
    By Tim_Attard in forum A3/S3 Forum (8L Chassis)
    Replies: 6
    Last Post: 15th September 2013, 13:56
  2. High pitch whine under boost
    By Scullies in forum A3/S3 Forum (8L Chassis)
    Replies: 8
    Last Post: 1st April 2013, 18:05
  3. High pitched squeel/squuek from under rocker cover?
    By max69vk in forum A3/S3/Sportback (8P Chassis)
    Replies: 0
    Last Post: 1st May 2012, 16:43
  4. high mileage remap? and boost afterwards? on a 1.8T A3
    By Prawn in forum A3/S3 Forum (8L Chassis)
    Replies: 10
    Last Post: 26th January 2007, 11:37
  5. High pitched noise when starting from cold
    By ajek in forum A6/S6/Allroad forum (C5 Chassis)
    Replies: 2
    Last Post: 13th November 2004, 15:00

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO