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Turbo use to flutter but now doesnt

Discussion in 'Motors' started by ItwasVTEC, 11 Sep 2021.

  1. ItwasVTEC

    Associate

    Joined: 11 Sep 2021

    Posts: 7

    Location: UK

    Hi fellas, I have a 2008 ford focus 1.6 TDCI (110), when I use to come off the throttle my turbo use to flutter a lot, and it was quite loud, but all of a sudden my turbo no longer flutters, all I hear is a whooshing sound when I come off the throttle, the car feels fine, no lack or drop in power, so was wondering if anyone had any ideas ?
     
  2. LizardKing

    Sgarrista

    Joined: 18 Oct 2002

    Posts: 7,859

    Location: The Land of Roundabouts

    Your wastegate was not working hence the flutter, now its either failed to the point it venting externally hence the woosh or working as intended (depending on how its suppose to sound!) either way best to have a look for any split boost pipes / investigate the wastegate
     
  3. ItwasVTEC

    Associate

    Joined: 11 Sep 2021

    Posts: 7

    Location: UK

    Hi there, thanks for this, I suspected it had something to do with that as sometimes it wouldn't flutter at all and sometimes it would flutter all the time,
     
  4. Scania

    Capodecina

    Joined: 25 Nov 2004

    Posts: 24,978

    Location: On the road....

    My V70 D5 does this, you hear a chirping/flutter ish sound on hard acceleration, performance seems fine, in fact very much better than a colleagues similar example - which doesn’t make the same sound - it’s done it since I’ve had the car and 12k miles later it seems no worse, I can’t figure out if it’s supposed to do it or not tbh.

    My truck just makes a high pitched whistling which you only really hear when the sunroof is open, which is what I’d expect the car to do….
     
  5. Nasher

    Capodecina

    Joined: 22 Nov 2006

    Posts: 21,809

    It might not be holding enough pressure anymore so isn't actually spinning up fully. I have this problem on an Abarth atm.

    The spring in the wastegate goes weaker over time, the turbo solenoid can die, hoses split etc. It needs someone with the kit to test it properly.
     
  6. Clarkey

    Capodecina

    Joined: 18 Oct 2002

    Posts: 18,231

    Wastegate is nothing to do with any flutter, you are thinking of a dump valve. Diesels don't have them though since they dont have throttle valves.
     
  7. LizardKing

    Sgarrista

    Joined: 18 Oct 2002

    Posts: 7,859

    Location: The Land of Roundabouts

    Your absolutely right, got my terminology mixed up :o
    Didnt know diesels lacked bovs, everydays a school day :D
     
  8. andy_mk3

    Capodecina

    Joined: 5 Oct 2009

    Posts: 11,535

    Location: Lincolnshire

    Most modern diesels do in some form, not used as a throttle valve like a petrol car, but it can shut of airflow to help with control and smoothness.