Engine noises running Cobb normal?

stupordave · 04-21-2013, 02:59 PM

Is it normal to hear an increase in whines and rattles after installing a tune? Running Cobb Stage 1 +FMIC aggressive tune with Dinan FMIC and Oil Cooler on my 335is. Car runs strong with no codes but makes a lot more noise (whines and rattles) when running a tune compared to stock. Looked at a log and didn't see any noticable issues and zero timing corrections but it grunts and rattles like a sick pig. Normal? If I unistall the tune, the noise quiets down considerably.

335xi Kevo · 04-22-2013, 06:07 PM

Maybe wastegate noise? I know on my procede you can change the values for the wastegate settings. On stock zero rattle. Tuned rattle (dependent on setting).

If its adjustable on your AP give that a whirl perhaps.

AK 335i · 04-22-2013, 06:21 PM

You are probably paranoid a guy around here thinks that his turbos whine or siren too. you guys should talk, he can fix it with Cobb I think

ashmostro · 04-22-2013, 07:31 PM

I've noticed more noise on my jb4 setup. I think it's the wastegates, but it's intermittent and I've tried different settings.

335is too...

buylongterm · 04-23-2013, 09:32 AM

I recently got my Cobb AP and when I first installed the Stage 1 aggressive map, I thought the engine ran very rough and thought I heard rattling, strange noises, etc. But after a few days running it, the car really seems to drive smoother and the noises I heard (or thought I heard) seemed to of gone away.

marv85 · 04-23-2013, 10:33 AM

Quote:

Originally Posted by stupordave

Is it normal to hear an increase in whines and rattles after installing a tune? Running Cobb Stage 1 +FMIC aggressive tune with Dinan FMIC and Oil Cooler on my 335is. Car runs strong with no codes but makes a lot more noise (whines and rattles) when running a tune compared to stock. Looked at a log and didn't see any noticable issues and zero timing corrections but it grunts and rattles like a sick pig. Normal? If I unistall the tune, the noise quiets down considerably.

are you running 4.02 maps?

stupordave · 04-23-2013, 09:14 PM

Quote:

Originally Posted by marv85

Quote:

Originally Posted by stupordave

Is it normal to hear an increase in whines and rattles after installing a tune? Running Cobb Stage 1 +FMIC aggressive tune with Dinan FMIC and Oil Cooler on my 335is. Car runs strong with no codes but makes a lot more noise (whines and rattles) when running a tune compared to stock. Looked at a log and didn't see any noticable issues and zero timing corrections but it grunts and rattles like a sick pig. Normal? If I unistall the tune, the noise quiets down considerably.

are you running 4.02 maps?

Yes. I'm running the .02 version stage 1+ FMIC on 93 octane.

stupordave · 04-28-2013, 04:35 PM

I'm getting closer...after several map changes and uninstalls, I've determined the noise happens with or without a tune installed. It's really noticable as the car downshifts in the low rpms. I can replicate the noise in park idling about 1250 rpm. Goes away slightly below or above this range. Doesn't do it at cold start but after it's been driven a bit.

I can hear it in the cabin, but not outside of the car with the hood up. In the cabin, it sounds as it's coming from the passenger side of the engine. Was thinking water pump at first but now leaning more towards some kind of harmonic rattle. Found a thread about someone relacing a fuel line and a simialr noise went away. Any thoughts?

M5Rlz · 04-28-2013, 05:12 PM

I'm more worried about the uptick in shifts being noticeably harder especially in the 1000-3k range, and on initial wot.

stupordave · 04-28-2013, 07:21 PM

Quote:

Originally Posted by 335iRlz

I'm more worried about the uptick in shifts being noticeably harder especially in the 1000-3k range, and on initial wot.

Manual?

M5Rlz · 04-28-2013, 07:28 PM

Quote:

Originally Posted by stupordave

Manual?

AT... I can't tell if its just the aggressive nature of the map mixed with how I feather it or something wrong.

04-21-2013, 02:59 PM	#1
stupordave Second Lieutenant 15 Rep 236 Posts Drives: 2011 335is Join Date: Sep 2011 Location: Golden, CO iTrader: (1)	Engine noises running Cobb normal? Is it normal to hear an increase in whines and rattles after installing a tune? Running Cobb Stage 1 +FMIC aggressive tune with Dinan FMIC and Oil Cooler on my 335is. Car runs strong with no codes but makes a lot more noise (whines and rattles) when running a tune compared to stock. Looked at a log and didn't see any noticable issues and zero timing corrections but it grunts and rattles like a sick pig. Normal? If I unistall the tune, the noise quiets down considerably.
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04-22-2013, 06:07 PM	#2
335xi Kevo Lieutenant 26 Rep 497 Posts Drives: 2008 335xi Join Date: Jan 2012 Location: CT iTrader: (3)	Maybe wastegate noise? I know on my procede you can change the values for the wastegate settings. On stock zero rattle. Tuned rattle (dependent on setting). If its adjustable on your AP give that a whirl perhaps. __________________ 08' 335xi 6MT Space Metallic Grey Premium, Nav, Cold weather, Sport Procede 2.5, DCI, Forge DV, PWM, Scoops, KW V1, ETS 5" FMIC, VRSF Downpipes, M3 Skirts
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04-22-2013, 06:21 PM	#3
AK 335i Major 48 Rep 1,290 Posts Drives: black 335i E90 Join Date: Sep 2012 Location: boynton beach iTrader: (0)	You are probably paranoid a guy around here thinks that his turbos whine or siren too. you guys should talk, he can fix it with Cobb I think
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04-22-2013, 07:31 PM	#4
ashmostro Brigadier General 1254 Rep 4,088 Posts Drives: 2020 M4cs \| 2022 M550i Join Date: Jan 2013 Location: Falls Church, VA iTrader: (27)	I've noticed more noise on my jb4 setup. I think it's the wastegates, but it's intermittent and I've tried different settings. 335is too...
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04-23-2013, 09:32 AM	#5
buylongterm Private First Class 15 Rep 115 Posts Drives: 2010 BMW 335XI M package Join Date: Apr 2013 Location: Chicago, IL iTrader: (0)	I recently got my Cobb AP and when I first installed the Stage 1 aggressive map, I thought the engine ran very rough and thought I heard rattling, strange noises, etc. But after a few days running it, the car really seems to drive smoother and the noises I heard (or thought I heard) seemed to of gone away. __________________ 2010 335xi Coupe \| M Package COBB Stage 1+ Aggressive FMIC \| aFe DCI \| Helix FMIC \| VRSF CP 2011 535diI
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04-28-2013, 04:35 PM	#8
stupordave Second Lieutenant 15 Rep 236 Posts Drives: 2011 335is Join Date: Sep 2011 Location: Golden, CO iTrader: (1)	I'm getting closer...after several map changes and uninstalls, I've determined the noise happens with or without a tune installed. It's really noticable as the car downshifts in the low rpms. I can replicate the noise in park idling about 1250 rpm. Goes away slightly below or above this range. Doesn't do it at cold start but after it's been driven a bit. I can hear it in the cabin, but not outside of the car with the hood up. In the cabin, it sounds as it's coming from the passenger side of the engine. Was thinking water pump at first but now leaning more towards some kind of harmonic rattle. Found a thread about someone relacing a fuel line and a simialr noise went away. Any thoughts?
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04-28-2013, 05:12 PM	#9
M5Rlz Colonel 249 Rep 2,202 Posts Drives: R8, f10m59(Rip), m4, GTR Join Date: Feb 2013 Location: MD iTrader: (3)	I'm more worried about the uptick in shifts being noticeably harder especially in the 1000-3k range, and on initial wot.
	Appreciate 0 Quote