when i hit the gas.... - BMW 3-Series (E90 E92) Forum

oshusttoley · 04-29-2013, 10:54 PM

when i start to accelerate from like 1.5k to 3k rpms, i hear something coming from the middle of my exhaust. it sounds like if you had a can of nails and shook them really fast while accelerating. is this the can flap or this my turbos crapping out? i have jb4 iso but dont have that can flap setting enabled. any input or anyone with this same sound? it seemed to get worse when i added the jb4 then worse again after i added ISO mod. it sounds horrible coming from a bmw when i accelerate. something basically sounds almost loose

AK 335i · 04-30-2013, 12:29 AM

e90company

Sick335 · 04-30-2013, 12:45 AM

Join the party

I've yet to figure out exactly what it is, but i assume it has something to do with my diff.

Sick335 · 04-30-2013, 12:46 AM

But i can only hear it when there's something to echo the sound back towards me(a car, wall, a bear, whatever)

Mahhvinn · 04-30-2013, 03:31 AM

I have that same issue too.

This started happening after I had my catless down pipes and AE exhaust installed. My buddies and I put the car on a lift to listen and we think it might be my waste gates? It's noticeable when I'm accelerating or when the car is decelerating. It's really annoying and makes my car sound like a civic with a ghetto chopped exhaust. Haha.

I remember there was a remedy for the rattle by adjusting a value for the waste gate or something on the Procede, not sure if it's the same for JB4. Hopefully someone will be able to chime in.

Rookie83 · 04-30-2013, 08:30 AM

Ive been experiencing the exact same thing. Ive always described it as bolts sitting on a vibrating piece of sheet metal. Either way it drives me crazy and sounds like shit

TT3 iN NyC · 04-30-2013, 08:42 AM

+1 same issue here.. lol.. its annoying

oshusttoley · 04-30-2013, 09:11 AM

Well at least I'm not going crazy thinking its just my car haha. And it really makes the BMW sound like shit for being a BMW. Anyone out there have a fix or what they did or found out exactly what the cause is? I have dp's too.

TT3 iN NyC · 04-30-2013, 09:15 AM

Quote:

Originally Posted by oshusttoley

Well at least I'm not going crazy thinking its just my car haha. And it really makes the BMW sound like shit for being a BMW. Anyone out there have a fix or what they did or found out exactly what the cause is? I have dp's too.

i believe its the wastegate rattle. When I had procede, the rattle can be adjusted. But with Cobb, i don't think theres a way without ATR.

oshusttoley · 04-30-2013, 09:21 AM

Quote:

Originally Posted by TT3 iN NyC

i believe its the wastegate rattle. When I had procede, the rattle can be adjusted. But with Cobb, i don't think theres a way without ATR.

There is a fix with that on jb4, ill play around with it. When I did fiddle with it at first, I got waste gate rate when I set the settings to low, and it sounds like an old type writer clicking really loud and fast. This sound I'm having is like a mesh sound of rattling nails on a sheet of foil haha. But I'll investagte more this weekend when I have time and access to my buddy's lift and keep you guys posted if I find a solution

pwr hungry · 04-30-2013, 09:22 AM

I have the same thing going on. My fix, single turbo and no more vacuum actuated wastegates. /thread

mrbillytalent · 04-30-2013, 11:20 AM

Mine does the same (I think) on g5 iso. I believe its the wastegates.

oshusttoley · 04-30-2013, 12:00 PM

Quote:

Originally Posted by mrbillytalent

Mine does the same (I think) on g5 iso. I believe its the wastegates.

What setting do you have the lag fix on. I left mine on 80 because it had a noticeable less lag then say if you set it to 40 or 60 in the lower rpms on throttle

mrbillytalent · 04-30-2013, 12:32 PM

I have set it all over and couldn't get rid of it.

dlbrooks18 · 04-30-2013, 12:43 PM

sounds like waste gate rattle..

CasperSYTFU · 04-30-2013, 12:51 PM

Mine did the same. Assumed waste-gates and stopped caring.

DriftDreamzSS · 04-30-2013, 01:10 PM

Quote:

Originally Posted by Sick335

But i can only hear it when there's something to echo the sound back towards me(a car, wall, a bear, whatever)

My car had this exact issue and it was the wastegates. My neighborhood has divided roads with high center curbs so the nasty sound would echo off the high curbs on one side and the parked cars on the other, sounded so terrible!

oshusttoley · 04-30-2013, 02:48 PM

Quote:

Originally Posted by DriftDreamzSS

My car had this exact issue and it was the wastegates. My neighborhood has divided roads with high center curbs so the nasty sound would echo off the high curbs on one side and the parked cars on the other, sounded so terrible!

If that's the case, I can try to get new turbos under warranty?

Rookie83 · 04-30-2013, 02:57 PM

Quote:

Originally Posted by oshusttoley

If that's the case, I can try to get new turbos under warranty?

Curious as well....

sad thing is i just had the turbos replaced less than a year ago for wastegate rattle

oshusttoley · 04-30-2013, 04:29 PM

Quote:

Originally Posted by Rookie83

Curious as well....

sad thing is i just had the turbos replaced less than a year ago for wastegate rattle

Never had mine replaced. Got an 08 with 48k miles

Sick335 · 04-30-2013, 10:03 PM

Quote:

Originally Posted by DriftDreamzSS

My car had this exact issue and it was the wastegates. My neighborhood has divided roads with high center curbs so the nasty sound would echo off the high curbs on one side and the parked cars on the other, sounded so terrible!

How did you fix it? Did adjusting the wastegate via tune help?

branabolic · 05-01-2013, 08:31 AM

Shouldn't this be replaced under warranty? I thought the turbos and waste gates were extended like the hpfp.I have an AE exhaust and catless DPs and the sound is nothing but awesome. I have an 08 with 37k miles BTW and original turbos and wastegates never adjusted yet.

04-29-2013, 10:54 PM	#1
oshusttoley Lieutenant Drives: 2008 335i sedan Join Date: Mar 2012 Location: New Jersey Posts: 539 iTrader: (0)	when i hit the gas.... when i start to accelerate from like 1.5k to 3k rpms, i hear something coming from the middle of my exhaust. it sounds like if you had a can of nails and shook them really fast while accelerating. is this the can flap or this my turbos crapping out? i have jb4 iso but dont have that can flap setting enabled. any input or anyone with this same sound? it seemed to get worse when i added the jb4 then worse again after i added ISO mod. it sounds horrible coming from a bmw when i accelerate. something basically sounds almost loose __________________ // JB4 ISO // Running Meth // Full FBO // E85 user //
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04-30-2013, 12:45 AM	#3
Sick335 Captain Drives: 335i Join Date: Oct 2011 Location: Tarzana, CA Posts: 746 iTrader: (0)	Join the party I've yet to figure out exactly what it is, but i assume it has something to do with my diff. __________________ JB4 G5 ISO+BMS Flash+RB Turbos+Meth=

04-30-2013, 12:46 AM	#4
Sick335 Captain Drives: 335i Join Date: Oct 2011 Location: Tarzana, CA Posts: 746 iTrader: (0)	But i can only hear it when there's something to echo the sound back towards me(a car, wall, a bear, whatever) __________________ JB4 G5 ISO+BMS Flash+RB Turbos+Meth=

04-30-2013, 03:31 AM	#5
Mahhvinn EUROPROJEKTZ Drives: backwards Join Date: Dec 2008 Location: San Jose, CA (Bay Area) Posts: 7,616 iTrader: (15) Garage List 2008 E90 335i [2.00]	I have that same issue too. This started happening after I had my catless down pipes and AE exhaust installed. My buddies and I put the car on a lift to listen and we think it might be my waste gates? It's noticeable when I'm accelerating or when the car is decelerating. It's really annoying and makes my car sound like a civic with a ghetto chopped exhaust. Haha. I remember there was a remedy for the rattle by adjusting a value for the waste gate or something on the Procede, not sure if it's the same for JB4. Hopefully someone will be able to chime in. __________________ LTMW\|SPEEDELEMENT\|EUROPROJEKTZ #TeamStretchNPoke

04-30-2013, 08:30 AM	#6
Rookie83 First Lieutenant Drives: 2009 335i 6mt cpe Join Date: May 2011 Location: DFW Posts: 362 iTrader: (1)	Ive been experiencing the exact same thing. Ive always described it as bolts sitting on a vibrating piece of sheet metal. Either way it drives me crazy and sounds like shit __________________ 09 tasman 335 6mt cpe, jb4 g5, bms dci, bms 3" catless dp's, 7"vrsf fmic, e85+93

04-30-2013, 12:29 AM	#2
AK 335i Captain Drives: black 335i E90 Join Date: Sep 2012 Location: boynton beach Posts: 677 iTrader: (0)	e90company

04-30-2013, 08:42 AM	#7
TT3 iN NyC Colonel Drives: AW/CR e92 335i Join Date: Aug 2007 Location: nYc Posts: 2,149 iTrader: (8)	+1 same issue here.. lol.. its annoying __________________ '07 e92 335i: Alpine White/Coral Red/Aluminum Trim COBB S2+FMIC \| Stett CAI \| Stett CP \| ETS FMIC \| FORGE DVs \| AR DPs \| Vanguard \|

04-30-2013, 09:11 AM	#8
oshusttoley Lieutenant Drives: 2008 335i sedan Join Date: Mar 2012 Location: New Jersey Posts: 539 iTrader: (0)	Well at least I'm not going crazy thinking its just my car haha. And it really makes the BMW sound like shit for being a BMW. Anyone out there have a fix or what they did or found out exactly what the cause is? I have dp's too. __________________ // JB4 ISO // Running Meth // Full FBO // E85 user //

04-30-2013, 09:22 AM	#11
pwr hungry Private First Class Drives: 335 Join Date: Mar 2013 Location: Amer'ca Posts: 134 iTrader: (0)	I have the same thing going on. My fix, single turbo and no more vacuum actuated wastegates. /thread

04-30-2013, 11:20 AM	#12
mrbillytalent Lieutenant Drives: '99 e46 323i & '07 e90 335i Join Date: May 2012 Location: Toledo OH Posts: 469 iTrader: (1)	Mine does the same (I think) on g5 iso. I believe its the wastegates.

04-30-2013, 12:32 PM	#14
mrbillytalent Lieutenant Drives: '99 e46 323i & '07 e90 335i Join Date: May 2012 Location: Toledo OH Posts: 469 iTrader: (1)	I have set it all over and couldn't get rid of it.

04-30-2013, 12:43 PM	#15
dlbrooks18 Brigadier General Drives: e90 335i Join Date: Nov 2008 Location: Los Angeles Posts: 3,190 iTrader: (2)	sounds like waste gate rattle.. __________________ 2008 E90 335

04-30-2013, 12:51 PM	#16
CasperSYTFU SYTFU Crew Drives: 2007 BMW 335i E92 Join Date: Aug 2010 Location: Bay Area, CA Posts: 1,170 iTrader: (8) Garage List 2007 BMW 335i E92 [4.50]	Mine did the same. Assumed waste-gates and stopped caring. __________________ █ PART OUT THREAD. OEM + Aftermarket FS █

05-01-2013, 08:31 AM	#22
branabolic Captain Drives: e92 335i Join Date: Apr 2008 Location: so. new hampshire Posts: 971 iTrader: (5)	Shouldn't this be replaced under warranty? I thought the turbos and waste gates were extended like the hpfp.I have an AE exhaust and catless DPs and the sound is nothing but awesome. I have an 08 with 37k miles BTW and original turbos and wastegates never adjusted yet. __________________ i'm not addicted to boost, but i sure am more fun when i'm on it.

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