Exhaust murmer

vrmoreno3 · 11-06-2016, 09:01 PM

2008 335 sedan nonsport.......Going to see if there is any idea on this. I get the check engine light every now and then. The mechanic says it is showing lean fuel or not enough air. They swapped out the intake tube. Still get the light. I've noticed that when I let off the exhaust the back pressure seems to cause something in the exhaust to rattle slightly then go away. Could anyone possibly chime in on this?

msjt · 11-07-2016, 09:24 AM

Probably wadtegate rattle. What's the codes?

vrmoreno3 · 11-08-2016, 09:18 AM

That is what I have tied it down to. I am not the original owner nor did I buy it CPO. I have no idea if they were ever replaced. I have a call in to a dealer to see if this is still covered by the recall. I am also looking at trying to find 1)used turbos with the problem corrected 2)new ones. Does anyone know if the current rattle will cause detrimental affects long term without getting fixed? Otherwise, it is annoying as hell when you let off the gas.

Jakester · 11-08-2016, 09:33 AM

Quote:

Originally Posted by vrmoreno3

That is what I have tied it down to. I am not the original owner nor did I buy it CPO. I have no idea if they were ever replaced. I have a call in to a dealer to see if this is still covered by the recall. I am also looking at trying to find 1)used turbos with the problem corrected 2)new ones. Does anyone know if the current rattle will cause detrimental affects long term without getting fixed? Otherwise, it is annoying as hell when you let off the gas.

Well the warranty is 10 years after the original purchase of the car or 82,000 miles, so depending on your car you might be safe on that.

vrmoreno3 · 12-16-2016, 02:01 PM

The was 30FF

limitdown · 12-16-2016, 10:35 PM

The wastegates aren't holding boost.
Your turbos might be need to be replaced.

CanadianTSi · 12-16-2016, 11:32 PM

30ff could be a boost leak, vacuum lines, solenoids, a whole plethera of things. I wouldn't just assume the turbos are bad.

JuniorB · 12-17-2016, 08:13 AM

If you got a cel,then you'll have a shadow code,good place to start before dumping money and removing parts.

Jaronbwall · 12-17-2016, 11:39 AM

It's probably the little flappy valve in the exhaust.

TBN54 · 12-17-2016, 12:11 PM

Unplug the acutator on the driver rear of the car in the trunk area. (Golf Tee Mod) That disables the driver side exhuast flap. You can rule out the flap from the issue by trying this.

11-06-2016, 09:01 PM	#1
vrmoreno3 First Lieutenant 14 Rep 389 Posts Drives: 2019 G05 X5 40 Join Date: Apr 2013 Location: Alabama iTrader: (3)	Exhaust murmer 2008 335 sedan nonsport.......Going to see if there is any idea on this. I get the check engine light every now and then. The mechanic says it is showing lean fuel or not enough air. They swapped out the intake tube. Still get the light. I've noticed that when I let off the exhaust the back pressure seems to cause something in the exhaust to rattle slightly then go away. Could anyone possibly chime in on this?
	Appreciate 0 Tweet Quote

11-07-2016, 09:24 AM	#2
msjt First Lieutenant 160 Rep 305 Posts Drives: e92 335i Join Date: Jan 2013 Location: queens, nyc iTrader: (0)	Probably wadtegate rattle. What's the codes?
	Appreciate 0 Quote

11-08-2016, 09:18 AM	#3
vrmoreno3 First Lieutenant 14 Rep 389 Posts Drives: 2019 G05 X5 40 Join Date: Apr 2013 Location: Alabama iTrader: (3)	That is what I have tied it down to. I am not the original owner nor did I buy it CPO. I have no idea if they were ever replaced. I have a call in to a dealer to see if this is still covered by the recall. I am also looking at trying to find 1)used turbos with the problem corrected 2)new ones. Does anyone know if the current rattle will cause detrimental affects long term without getting fixed? Otherwise, it is annoying as hell when you let off the gas.
	Appreciate 0 Quote

12-16-2016, 02:01 PM	#5
vrmoreno3 First Lieutenant 14 Rep 389 Posts Drives: 2019 G05 X5 40 Join Date: Apr 2013 Location: Alabama iTrader: (3)	The was 30FF
	Appreciate 0 Quote

12-16-2016, 10:35 PM	#6
limitdown First Lieutenant 187 Rep 337 Posts Drives: 2007 335i E93 Join Date: Jul 2015 Location: Location iTrader: (0)	The wastegates aren't holding boost. Your turbos might be need to be replaced.
	Appreciate 0 Quote

12-16-2016, 11:32 PM	#7
CanadianTSi Captain 207 Rep 607 Posts Drives: 2014 535 xDrive Diesel Join Date: Feb 2007 Location: Alberta iTrader: (0)	30ff could be a boost leak, vacuum lines, solenoids, a whole plethera of things. I wouldn't just assume the turbos are bad.
	Appreciate 0 Quote

12-17-2016, 08:13 AM	#8
JuniorB Major 186 Rep 1,017 Posts Drives: 07 e60 525 N54 Join Date: Mar 2016 Location: Rhode Island iTrader: (0)	If you got a cel,then you'll have a shadow code,good place to start before dumping money and removing parts.
	Appreciate 0 Quote

12-17-2016, 11:39 AM	#9
Jaronbwall Driving cars and riding bikes really fast 296 Rep 1,023 Posts Drives: 2009 335i Join Date: Sep 2014 Location: Indianapolis iTrader: (0)	It's probably the little flappy valve in the exhaust. __________________ 335i, sport pkg, 3 pedals, Blacked out, LED markers, OZ Ultraleggera wheels, Firestone Indy 500s, x-pipe, vibrant 1792, PE mod MHD stage 2+, BMS DPs, ARM charge pipe, Tial BOV, ARM FMIC, dual cone, CSF radiator, M3 control arms, sways, HAWK pads. https://www.strava.com/athletes/8309149 Follow me on Strava
	Appreciate 1 TBN54425.00 Quote

12-17-2016, 12:11 PM	#10
TBN54 Captain 425 Rep 793 Posts Drives: 08' E92 335 -> 17' F30 340i Join Date: Dec 2015 Location: Upstate NY iTrader: (0)	Unplug the acutator on the driver rear of the car in the trunk area. (Golf Tee Mod) That disables the driver side exhuast flap. You can rule out the flap from the issue by trying this.
	Appreciate 0 Quote