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Rattling/chatter noise when letting off the gas #4667794
02/16/18 01:03 PM
02/16/18 01:03 PM
Joined: Sep 2013
Posts: 102
ny
llmercll Offline OP
llmercll  Offline OP
Joined: Sep 2013
Posts: 102
ny
I've noticed this for awhile on my 2003 jetta but just today I noticed it's much worse. When I accelerate there is no noise, but when I let off the throttle I get a loud chatter/rattle. Does anyone know the possible culprits?

I've uploaded a recording.

https://drive.google.com/file/d/1IoelK7sCubi-NhFMOb0JDGT8-ZQMaoH4/view?usp=sharing

Re: Rattling/chatter noise when letting off the gas [Re: llmercll] #4667820
02/16/18 01:27 PM
02/16/18 01:27 PM
Joined: Jan 2017
Posts: 296
Ontario, Canada
newbe46 Offline
newbe46  Offline
Joined: Jan 2017
Posts: 296
Ontario, Canada
The heat shield is hitting something?


2003 E46 M3 Convertible
2004 Odyssey EX-L
2004 Impreza TS Wagon
Re: Rattling/chatter noise when letting off the gas [Re: llmercll] #4667851
02/16/18 02:04 PM
02/16/18 02:04 PM
Joined: Jul 2003
Posts: 2,385
MN
tmorris1 Offline
tmorris1  Offline
Joined: Jul 2003
Posts: 2,385
MN
My guess too. Sounds like exhaust rattle of some kind.

Re: Rattling/chatter noise when letting off the gas [Re: llmercll] #4667902
02/16/18 03:23 PM
02/16/18 03:23 PM
Joined: Nov 2011
Posts: 1,053
Lyndhurst NJ
Audios Offline
Audios  Offline
Joined: Nov 2011
Posts: 1,053
Lyndhurst NJ
Loose heat shield or bolt on the exhaust, or the catalyst is breaking up.


2002 VW Golf TDI-Mobil 1 5/40 TDT
2007 Mercedes GL320 CDI Fuchs 5/40 GT Pro XTL
2005 BMW M3 BMW Twin Power 10/60
2003 BMW M5-Fuchs 5/40
1998 BMW M3/4/5 Fuchs 5/40
Re: Rattling/chatter noise when letting off the gas [Re: llmercll] #4667969
02/16/18 04:26 PM
02/16/18 04:26 PM
Joined: Nov 2006
Posts: 19,916
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,916
MA, Mittelfranken.de
+3 heat shield.


ASE L1, Master. Deutsch Meisterbrief.
Re: Rattling/chatter noise when letting off the gas [Re: llmercll] #4668086
02/16/18 06:42 PM
02/16/18 06:42 PM
Joined: Dec 2014
Posts: 191
USA
dbias Offline
dbias  Offline
Joined: Dec 2014
Posts: 191
USA
how are the engine mounts looking. could engine movement during deceleration be making contact with something? do you hear any thumping sounds from time to time?


2011 VW JETTA Castrol Edge 0W-40
2012 FORD TRANSIT CONNECT Castrol Edge 5W-20
2016 HONDA CIVIC COUPE Castrol Edge 0W-20
2017 AUDI A4 Ravenol SSL 0W-40
Re: Rattling/chatter noise when letting off the gas [Re: Audios] #4671881
02/20/18 01:25 PM
02/20/18 01:25 PM
Joined: Sep 2013
Posts: 102
ny
llmercll Offline OP
llmercll  Offline OP
Joined: Sep 2013
Posts: 102
ny
I noticed it happened on a very wet day where my engine was misfiring. It seems to have gone away. Could the misfiring be breaking up the catalytic converter and making this noise?


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