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      06-27-2010, 03:14 PM   #1
Memphis1
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Exhaust farts

Guys, I took my car in for a faulty seat sensor and they kept it over the weekend. Well since I got it back my car sounds quieter. No farts, barks or anything. almost like. 335i. Do you think they fucked with my software?? On purpose or by accident?? Or do you think something else is wrong??
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      06-27-2010, 03:38 PM   #2
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Guys, I took my car in for a faulty seat sensor and they kept it over the weekend. Well since I got it back my car sounds quieter. No farts, barks or anything. almost like. 335i. Do you think they fucked with my software?? On purpose or by accident?? Or do you think something else is wrong??
Do they show any SW updates? Have you tried Normal vs Sport? I don't get them in Normal mode unless pushing it a bit but they're more prevalent in Sport.
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      06-27-2010, 05:54 PM   #3
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i dont even get them in sport + anymore

i checked the receipts and nothing about SW
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      06-27-2010, 06:15 PM   #4
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Maybe because the car was in the shop for a while and you haven't driven it for that period of time. I am guessing that passing some time, the sensation of the exhaust sounds will return.

For example, I driven a noisier NAPA truck all day years ago. At the end of the day, I hopped into my '98 Eddie Bauer Ford Explorer and it was much quieter and it felt like driving a different car unlike before work. After some time passed, the noises and sounds of my truck returned back to normal.

Or your Z4 had broken-in further as things are smoother now than it used to be. Or a different brand of gasoline was used?

Just throwing some ideas out there.

Last edited by MDLFCS; 06-27-2010 at 06:20 PM.
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      06-27-2010, 06:50 PM   #5
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maybe, i'll have to beat it into submission
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      06-27-2010, 06:51 PM   #6
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      06-27-2010, 07:45 PM   #7
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I think Memphis knows how to do that

You will see he get his sound back
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      06-27-2010, 08:43 PM   #8
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If the seat sensor needed to be mapped into the software , they would have updated your software without charge if you were behind a revision (or two).
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      06-28-2010, 07:09 AM   #9
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I would like to know how the dealer made your car quieter, if nothing else. It is a luxury sports car after all

It is funny that you describe your exhaust as farting, but as I am looking back, yes, my car do fart a lot! It must be the fuel!
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      06-28-2010, 11:19 AM   #10
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Actually I get the "farts" when I'm in Normal mode and shift fairly hard, they don't seem to be as prevalent in sport or sport+. It must be the slower shifts in Normal doing it, either that or the car recognizes an old fart behind the wheel when I'm in "Normal mode"

I get great gas mileage in Normal but sh*t, that's no fun....
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      06-28-2010, 11:43 AM   #11
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i was told (this last week), but not sure i believe, that when they update the software on these z4's they update ALL the software for all the modules (ie, they no longer update individual modules). In other words, they are given one large update file from bmw these days. If true, then this could be the reason for the change you noticed. It could also explain why you go in to get something fixed and something totally unrelated breaks....
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      06-28-2010, 01:04 PM   #12
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Quote:
Originally Posted by mikeinaustin View Post
i was told (this last week), but not sure i believe, that when they update the software on these z4's they update ALL the software for all the modules (ie, they no longer update individual modules). In other words, they are given one large update file from bmw these days. If true, then this could be the reason for the change you noticed. It could also explain why you go in to get something fixed and something totally unrelated breaks....
When I used to take my Audi A6 in, unrelated things broke all the time, mostly due to idiots working on it. Forgetting to plug stuff back in properly etc....I have nothing bad to say about my BMW guys ..yet.

I also had the BMW softwre rev and a Dinan remap at the same time . My car growls a lot and runs great now...definitely not quiet..
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Last edited by mcbeee; 06-28-2010 at 02:17 PM. Reason: typo
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      06-28-2010, 02:56 PM   #13
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try in sport mode and let change gears at around 4500 rpm , if it doest "fart" then something isnt right :P
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      06-28-2010, 07:42 PM   #14
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yeah, i've revved it all weekend, but my car used to do it all the time, even the split second you took your foot of the break and unto the gas pedal. even in sport + when i downshift, it doesn't fart and bark like it used to, but now that you guys mention it, i think maybe i should reset my tranny, maybe that's the reason.
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      06-28-2010, 10:13 PM   #15
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Quote:
Originally Posted by Memphis1 View Post
yeah, i've revved it all weekend, but my car used to do it all the time, even the split second you took your foot of the break and unto the gas pedal. even in sport + when i downshift, it doesn't fart and bark like it used to, but now that you guys mention it, i think maybe i should reset my tranny, maybe that's the reason.
Add some beans to the fuel too.
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      06-30-2010, 07:26 AM   #16
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Is the fart just the DCT blipping the throttle on down shifts?
The throttle is programmed to do that in the 35i, but (they tell me at BMW) not to do it in the 30i auto.

Just a though...
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      06-30-2010, 08:07 AM   #17
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I thought the farts occurs during acceleration and get separated during upshifting. But, you may be right, the blipping could be part of it.
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      07-05-2010, 11:15 AM   #18
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Quote:
Originally Posted by Dr Stig 2 View Post
Is the fart just the DCT blipping the throttle on down shifts?
The throttle is programmed to do that in the 35i, but (they tell me at BMW) not to do it in the 30i auto.

Just a though...
well, my 30i manual burps, belches, farts, and i think giggles too...i dont know what happened to yours but im pretty sure it was intended to be there at the start. i am wondering if any detrimental underlying issues could cause this lack of gastric orchastration? i mean shit...that the car's irritable bowel syndrom is at least 1/3 of its total charm. i would demand bmw to make my car fart once more!
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      12-08-2011, 10:14 AM   #19
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Had my car in for a software update (to make the LPFP stop whining) and noticed that my car's farts now last about 3 times longer than before. She's always been farting, but now we're talking about farts that'll make nearby sailors blush.

Not sure if we're talking about the same gaseous behaviour however as my girl farts whenever I take my foot off the gas pedal (moderate RPMs, not accelerating or anything before that).

By the way, I'm not complaining or anything. I kind of like it.
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      12-08-2011, 10:56 AM   #20
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Quote:
Originally Posted by juhap View Post
Had my car in for a software update (to make the LPFP stop whining) and noticed that my car's farts now last about 3 times longer than before. She's always been farting, but now we're talking about farts that'll make nearby sailors blush.

Not sure if we're talking about the same gaseous behaviour however as my girl farts whenever I take my foot off the gas pedal (moderate RPMs, not accelerating or anything before that).

By the way, I'm not complaining or anything. I kind of like it.
What are you feeding her? Might it be the gas? BTW what kind of smell is it?
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      12-08-2011, 01:10 PM   #21
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i think it was coincidence with my car that high humidity and high temperature kill the farts.... kinda like pepto for the car... but anything cooler than 80 and no humidity and she's farting up a storm... plus with the medical pinch on the valve that controls the butterfly flap and now she's extra loud! love it.
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      12-08-2011, 03:25 PM   #22
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Quote:
Originally Posted by Dr Stig 2 View Post
Is the fart just the DCT blipping the throttle on down shifts?
The throttle is programmed to do that in the 35i, but (they tell me at BMW) not to do it in the 30i auto.

Just a though...
The 30i does burble nicely, but only in the sport mode, and the Eisenmann exhaust doesn't hurt either. But after the software refresh last year it took about a week for the farts to return.
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