Fiat Coupe Forum
- Founded by Kayjey & James Northam
- Funded by the Club for the benefit of all owners
Fiat Coupe Club UK
join the club
Fiat Coupe Forum
 
» Announced
    Posting images


» Related sites
    Main club site
    fiatcoupe.net


» External data
    owners listed
 
Who's Online Now
2 registered members (2 invisible), 143 guests, and 2 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics110,186
Posts1,308,379
Members2,872
Most Online546
Aug 30th, 2007
Top Posters(All Time)
barnacle 32,262
stan 32,098
Theresa 22,867
bockers 21,015
PeteP 19,219
JimO 17,908
Nigel 17,180
Jim_Clennell 16,342
Vickster 15,915
RSS Feeds
Club Events
Club Information
Track Events
Rolling Road/RWYB
Social Events
Non-UK Events
Coupé Related Chat
Coupé Spotting
Coupé News/Press
Buying/Selling Advice
Insuring a Coupé
Basic FAQ's
How to Guides
Forum Issues
Technical Problems
General Maintenance
Styling
Tuning
Handling
ICE and Alarm
Coupés for Sale
Coupés Wanted
Parts for Sale
Parts Wanted
Group Buys
Business Forum
Other Vehicles for Sale/Wanted
Other Items for Sale/Wanted
Haggling/Offers
Ebay links
Other Cars
Other Websites
General Chat
Previous Thread
Next Thread
Print Thread
Car sounding like a hoover #1635592
17/09/2019 17:27
17/09/2019 17:27
Joined: Mar 2015
Posts: 230
France
Yann Offline OP
Making a profit
Yann  Offline OP
Making a profit

Joined: Mar 2015
Posts: 230
France
Hi,

I’ve recently noticed that my car is noisy when flooring the throttle, above 2500-3000 RPM (once the turbo starts its magic) and sounds like a hoover. If I release the throttle it’s OK.
I checked all the intake pipes (from the turbo to the airbox, from the airbox to the throttle body), cleaned them, refitted them and tightened them correctly but it still sounds like it’s sucking/releasing air somewhere. Maybe it’s normal but I doubt as I don’t remember hearing this sound before.

What could cause this noise ? I noticed the exhaust tailpipe is perforated by rust on the welding but it’s probably not related.

Thanks

Re: Car sounding like a hoover [Re: Yann] #1635604
18/09/2019 06:06
18/09/2019 06:06
Joined: May 2011
Posts: 2,300
Caston, Norfolk
B
BBR Offline
Club membership secretary
BBR  Offline
Club membership secretary
Competition Level
B

Joined: May 2011
Posts: 2,300
Caston, Norfolk
Have you checked the filter in the airbox?
It could be an exhaust leak on the downpipe area too


If you want to talk to me send me an email at richard_ives@sky.com
Or follow the links to a modern social media channel in my profile
Re: Car sounding like a hoover [Re: Yann] #1635608
18/09/2019 11:45
18/09/2019 11:45
Joined: Sep 2007
Posts: 573
Freedom
Master_Mariner Offline
Club member 583
Master_Mariner  Offline
Club member 583
Enjoying the ride

Joined: Sep 2007
Posts: 573
Freedom
Is your car still running the original (plastic) dump valve?

Are the hoses to it/from it all attached tightly? A leak there could cause some noise.

Regards

MM

Re: Car sounding like a hoover [Re: Master_Mariner] #1635660
20/09/2019 13:33
20/09/2019 13:33
Joined: Mar 2015
Posts: 230
France
Yann Offline OP
Making a profit
Yann  Offline OP
Making a profit

Joined: Mar 2015
Posts: 230
France
Originally Posted by BBR
Have you checked the filter in the airbox?
It could be an exhaust leak on the downpipe area too

I didn't check the air filter, will do that next time. Good idea on the downpipe, I removed some nuts few months ago, maybe I messed up with something.
Originally Posted by Master_Mariner
Is your car still running the original (plastic) dump valve?

Are the hoses to it/from it all attached tightly? A leak there could cause some noise.

Regards

MM

Yes, it's the original valve, the hose are tight, one is less tight but it has always been like that.

I was wondering if a faulty dump valve or wastegate could be the cause of the noise ?

Re: Car sounding like a hoover [Re: Yann] #1635781
26/09/2019 15:08
26/09/2019 15:08
Joined: Sep 2007
Posts: 573
Freedom
Master_Mariner Offline
Club member 583
Master_Mariner  Offline
Club member 583
Enjoying the ride

Joined: Sep 2007
Posts: 573
Freedom
Most have upgraded to a metal dump valve - as the plastic one wears out eventually.

Regards

Re: Car sounding like a hoover [Re: Yann] #1635836
30/09/2019 18:30
30/09/2019 18:30
Joined: Mar 2018
Posts: 1
Canada
K
krtek Offline
Newbie
krtek  Offline
Newbie
K

Joined: Mar 2018
Posts: 1
Canada
Mine is doing the same thing, sounds literally like a vaccuum cleaner going around the track. I've noticed it won't hold boost past 17PSI and the acceleration is uneven when past 80% throttle.

Re: Car sounding like a hoover [Re: Yann] #1635862
01/10/2019 06:47
01/10/2019 06:47
Joined: Dec 2005
Posts: 1,664
Didcot - Oxon
RusH Offline
Club Member 1771
RusH  Offline
Club Member 1771
My life on the forum

Joined: Dec 2005
Posts: 1,664
Didcot - Oxon
I’d say it’s more of a ‘moo’ sound when the standard re-circ starts to fail.

Definitely sounds like the oe unit could be failing.


[Linked Image]
Re: Car sounding like a hoover [Re: Yann] #1635897
01/10/2019 21:27
01/10/2019 21:27
Joined: Mar 2015
Posts: 230
France
Yann Offline OP
Making a profit
Yann  Offline OP
Making a profit

Joined: Mar 2015
Posts: 230
France
I was on a trackday in August and also had the feeling that the car was missing power and constantly making the noise, maybe it’s worth to change the dump valve (that’s the recirc valve, right ?) then...

Last edited by Yann; 01/10/2019 21:28.
Re: Car sounding like a hoover [Re: Yann] #1635919
03/10/2019 12:36
03/10/2019 12:36
Joined: Jan 2006
Posts: 9,880
SW London
suba Offline
Je suis un Coupé
suba  Offline
Je suis un Coupé

Joined: Jan 2006
Posts: 9,880
SW London
If's it's on the original DV then change it anyway as your first thing to check - the rubber diaphragm will be utterly shot by now - that's what causes the 'mooooo' noise and leak.


Rotary fun - 370 bhp per ton. GT30's are small you know?!??!?!?!
Re: Car sounding like a hoover [Re: Yann] #1635941
03/10/2019 19:36
03/10/2019 19:36
Joined: Mar 2015
Posts: 230
France
Yann Offline OP
Making a profit
Yann  Offline OP
Making a profit

Joined: Mar 2015
Posts: 230
France
I tried blowing through it last month when checking the pipes, it wasn’t leaking, at least for a small pressure...


Powered by UBB.threads™ PHP Forum Software 7.7.1
(Release build 20190129)
PHP: 7.3.9 Page Time: 0.014s Queries: 14 (0.006s) Memory: 0.7855 MB (Peak: 0.8832 MB) Data Comp: Off Server Time: 2019-10-17 08:05:53 UTC