Why does my exhaust not crackle and pop anymore?

bimmer456 · 07-10-2017, 04:11 PM

Quote:

Originally Posted by mikeleeyh

Does unplugging the battery reset it as well?

Thanks,
Mike

Not sure. I would lose all my settings again but I think it would copy back from the keyfob as it seems to keep the settings there.

mikeleeyh · 07-10-2017, 04:22 PM

Quote:

Originally Posted by bimmer456

Not sure. I would lose all my settings again but I think it would copy back from the keyfob as it seems to keep the settings there.

That's a good point. So unplugging batteries probably won't reset the computer.

Thanks!

jalkster · 07-11-2017, 06:59 AM

Quote:

Originally Posted by jmb2027

I was reading in the 2-series section that TC Off in Comfort Mode = lots more pops.
Anyone can confirm this for 340i M Sport? (MPPK & MPE)

Comfort mode isnt supposed to produce the burbles and pops... so idk where that came from.

jalkster · 07-18-2017, 06:36 AM

Quote:

Originally Posted by jmb2027

For the M2, comfort + TC off = a lot more pops

Interesting. As soon as you turn DSC and TC off (hold for 3 seconds) in a 340i it puts the steering, transmission, and exhaust all into comfort mode. Another reason I really want a flash tune.

Chicken_Joe · 07-30-2017, 03:37 PM

If you have a JB4 try messing with the DWP or default wastegate position. I have a 6MT so the car tends to burble and crackle more just from the gearing but I went from stock DWP which is think is 80. I have an N55. I dropped it to 50 I think (will double check) and now it get more burbles on top of only driving in DSC off exclusively when it's dry out.

wadesung · 08-08-2017, 10:26 PM

Brought my car in last week to have the dealer look into issue with headlight. They mentioned they had to upgrade the software to get the lights working. Picked up the car a week later, on my way home today the car felt different. Started having the same symptoms with the exhaust it no longer pop and bang like before. Were you able to have this fixed? Any advice is greatly appreciated.

DG20 · 08-08-2017, 10:53 PM

Quote:

Originally Posted by wadesung

Brought my car in last week to have the dealer look into issue with headlight. They mentioned they had to upgrade the software to get the lights working. Picked up the car a week later, on my way home today the car felt different. Started having the same symptoms with the exhaust it no longer pop and bang like before. Were you able to have this fixed? Any advice is greatly appreciated.

Hey, so I brought my car in for service last week and I mentioned this issue to the guy and he had no idea what I was talking about nor did he have a fix for it. I had another issue with the car that required reflashing the entire ECU, so when I get the car back I will report on what happened and if that fixed the exhaust issue.

eluded · 08-09-2017, 01:25 AM

It's pretty obvious from reading the thread, don't bring the car to the dealer. Bad things happen. Software gets updating and the car runs different. You're beautiful bumper has dents and scratches in it now.

theMpower · 08-09-2017, 02:25 PM

At least in the Mx40i, I have verified that updating the DME to last version the car loses performance. Its very notable. Less Pops & Bangs and lighter. Even the Sport Display show less power. After a few days, I downgraded the DME to the factory version (I-step 16-07-503) and returned to normal.

Notice that this is only my opinion, but it is a very easy way to enlarge the difference between the M2 and M240i, and dispel the doubt of which runs more in a straight line.

Days later, I went to a dyno and on map 0 + downpipe, 377hp - 540Nm. I'm curious to try again. With the JB4 v8, the car goes much better.

For those interested, I confirm that it is possible to load DME soft from Mx40i into x40i without physically altering DME

jacksonite · 11-24-2017, 11:42 AM

My car would turn heads every foot with the crackles and pops before the o2 extenders were installed. I got the CEL like 350 miles after installing the VM downpipe. However, the car sounded like it wanted to turn off during idle which was wierd. The sounds are definitely gone which i dont mind since i prefer more performance than just sounds. But i do feel that performance was also dropped with the o2 extenders. However i only have 6 miles on it right now with the o2 extenders so i will update you guys after about 300 miles with them.

Keep in mind i have a full Akrapovic exhaust system from the downpipes, with BMS intake, and dinan sportronics.

Antec800 · 11-26-2017, 09:09 PM

I have a catless downpipe in my 17 340x over 3k miles no light yet with updates jb4, although now I’m thinking I may have not flashed the newest firmware on my jb4 since the light hasn’t come on yet

riskmaker76 · 11-27-2017, 09:18 AM

Its the O2 sensors that measure fuel to air mixture - need to let the car adjust..

PS - Down pipes dont add much on this platform - in fact they add premature throttle closures..

Quote:

Originally Posted by jacksonite

My car would turn heads every foot with the crackles and pops before the o2 extenders were installed. I got the CEL like 350 miles after installing the VM downpipe. However, the car sounded like it wanted to turn off during idle which was wierd. The sounds are definitely gone which i dont mind since i prefer more performance than just sounds. But i do feel that performance was also dropped with the o2 extenders. However i only have 6 miles on it right now with the o2 extenders so i will update you guys after about 300 miles with them.

Keep in mind i have a full Akrapovic exhaust system from the downpipes, with BMS intake, and dinan sportronics.

P0NYB0Y · 08-30-2018, 01:36 PM

Quote:

Originally Posted by AW F30

solved

so how was it solved? please post for the rest of us.

Currently having the same issue with my car.

VVlasy · 08-30-2018, 03:29 PM

Well I just got the MPPSK installed and have the latest car iStep 06-2018 (software version) and when I floor it in sport in second up to 5k but not above 6k, I get crazy gun shots.

TreDirtyFive · 08-30-2018, 08:58 PM

what was the solve?

Madnyah · 09-10-2018, 08:03 AM

In Europe, BMW has remove the pop and bang (not tatally) since the law has change... I'm still in debate with BMW Europe for that. I've said that they still sell the Sound and Power package and, i've question why a M5 still pop but not the B58...

B58 · 09-12-2018, 07:56 PM

Damn i have a service appointment this coming Saturday morning, should i be nervous? LOL

Madnyah · 09-13-2018, 04:29 AM

I'm not really sure about Cali or USA, It's an European law for the sound of the cars...

I've seen some of the best mapping in France and Swiss yesterday. And they have release a map in stage 1 via OBD = 396PS and 630N/m for a B58 !!! With a BMC filter of corse. Don't put a open filter in your car at least it's in the front of the grill. It's only take hot air if the filter is under the hood..

But if you want a really noisy sound go for an Armytrix exhaust.

DG20 · 09-13-2018, 10:44 PM

Sorry about the confusion here, I truly have no idea why I wrote solved when really nothing was done

My exhaust does crackle, but it doesn't explosively pop and bang like it did before

White_Knight_M235i · 02-05-2019, 04:12 PM

was there ever a fix to it??

vinzcast21 · 02-06-2019, 12:31 AM

i did a reso delete and all the pops come ut!

Rebound · 02-06-2019, 07:15 AM

Isn't the crackling sound caused by fuel burning inside the exhaust? This doesn't seem like a good thing for your exhaust, performance or mileage.

I realize that there are some upstream causes, such as ignition timing changes which tune performance, but the crackling itself is an inefficiency, and not higher performance, right?

07-30-2017, 03:37 PM	#27
Chicken_Joe Lieutenant Colonel 606 Rep 1,782 Posts Drives: 2013 F30 335i M Sport. EB 6M Join Date: Dec 2015 Location: Frontenac, Missouri iTrader: (3)	If you have a JB4 try messing with the DWP or default wastegate position. I have a 6MT so the car tends to burble and crackle more just from the gearing but I went from stock DWP which is think is 80. I have an N55. I dropped it to 50 I think (will double check) and now it get more burbles on top of only driving in DSC off exclusively when it's dry out. __________________ 13' 335i M Sport. EBII/Coral Red 6MT. RPI GT exhaust, Resonator delete, PS1, GFB DV , BM3 Stage 2, ER CP, VRSF DP, VRSF 5.5in Stepped FMIC, Dinan Shockware. Carbon M Performance rear diffuser. M4 trunk lip. Conti DWS06 225/40/19 and 255/35/19
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08-08-2017, 10:26 PM	#28
wadesung Registered 0 Rep 1 Posts Drives: F36 Join Date: Jun 2017 Location: 98059 iTrader: (0)	Brought my car in last week to have the dealer look into issue with headlight. They mentioned they had to upgrade the software to get the lights working. Picked up the car a week later, on my way home today the car felt different. Started having the same symptoms with the exhaust it no longer pop and bang like before. Were you able to have this fixed? Any advice is greatly appreciated.
	Appreciate 0 Quote

08-09-2017, 01:25 AM	#30
eluded 2JZ-GTE 3005 Rep 3,986 Posts Drives: 340 6MT, 50e, others Join Date: Nov 2015 Location: Sofia iTrader: (0)	It's pretty obvious from reading the thread, don't bring the car to the dealer. Bad things happen. Software gets updating and the car runs different. You're beautiful bumper has dents and scratches in it now. __________________ A man who views the world the same at 50 as he did at 20 has wasted 30 years of his life.
	Appreciate 0 Quote

08-09-2017, 02:25 PM	#31
theMpower New Member 12 Rep 28 Posts Drives: G82 xDrive + G20 M340d Join Date: Jun 2012 Location: Spain iTrader: (0)	At least in the Mx40i, I have verified that updating the DME to last version the car loses performance. Its very notable. Less Pops & Bangs and lighter. Even the Sport Display show less power. After a few days, I downgraded the DME to the factory version (I-step 16-07-503) and returned to normal. Notice that this is only my opinion, but it is a very easy way to enlarge the difference between the M2 and M240i, and dispel the doubt of which runs more in a straight line. Days later, I went to a dyno and on map 0 + downpipe, 377hp - 540Nm. I'm curious to try again. With the JB4 v8, the car goes much better. For those interested, I confirm that it is possible to load DME soft from Mx40i into x40i without physically altering DME
	Appreciate 0 Quote

11-24-2017, 11:42 AM	#32
jacksonite Private 27 Rep 91 Posts Drives: 440i coupe MT Join Date: Oct 2011 Location: Los Angeles iTrader: (0)	Crackles and pops gone after o2 extenders installed My car would turn heads every foot with the crackles and pops before the o2 extenders were installed. I got the CEL like 350 miles after installing the VM downpipe. However, the car sounded like it wanted to turn off during idle which was wierd. The sounds are definitely gone which i dont mind since i prefer more performance than just sounds. But i do feel that performance was also dropped with the o2 extenders. However i only have 6 miles on it right now with the o2 extenders so i will update you guys after about 300 miles with them. Keep in mind i have a full Akrapovic exhaust system from the downpipes, with BMS intake, and dinan sportronics.
	Appreciate 0 Quote

11-26-2017, 09:09 PM	#33
Antec800 Lieutenant 128 Rep 462 Posts Drives: 340i x drive Join Date: Apr 2017 Location: Michigan iTrader: (0)	I have a catless downpipe in my 17 340x over 3k miles no light yet with updates jb4, although now I’m thinking I may have not flashed the newest firmware on my jb4 since the light hasn’t come on yet
	Appreciate 0 Quote

08-30-2018, 03:29 PM	#36
VVlasy Private First Class 48 Rep 130 Posts Drives: 2016 440i xDrive GC with MPPSK Join Date: Sep 2016 Location: Prague iTrader: (0)	Well I just got the MPPSK installed and have the latest car iStep 06-2018 (software version) and when I floor it in sport in second up to 5k but not above 6k, I get crazy gun shots.
	Appreciate 0 Quote

08-30-2018, 08:58 PM	#37
TreDirtyFive Major 253 Rep 1,334 Posts Drives: X3 M40i Join Date: Jun 2008 Location: Los Angeles, CA iTrader: (11)	what was the solve? __________________ X3 M40i G01, M235i F22, 335 F30 MSport, 135 DCT, 335 E92, Audi A3
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09-10-2018, 08:03 AM	#38
Madnyah New Member 3 Rep 16 Posts Drives: 340Xdrive F30 2016 Join Date: Mar 2018 Location: Switzerland iTrader: (0)	In Europe, BMW has remove the pop and bang (not tatally) since the law has change... I'm still in debate with BMW Europe for that. I've said that they still sell the Sound and Power package and, i've question why a M5 still pop but not the B58...
	Appreciate 0 Quote

09-12-2018, 07:56 PM	#39
B58 Major 558 Rep 1,456 Posts Drives: 922 Turbo Join Date: May 2018 Location: USA iTrader: (1)	Damn i have a service appointment this coming Saturday morning, should i be nervous? LOL __________________ 2024 X3 M40i 2014 BMW M5
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09-13-2018, 04:29 AM	#40
Madnyah New Member 3 Rep 16 Posts Drives: 340Xdrive F30 2016 Join Date: Mar 2018 Location: Switzerland iTrader: (0)	I'm not really sure about Cali or USA, It's an European law for the sound of the cars... I've seen some of the best mapping in France and Swiss yesterday. And they have release a map in stage 1 via OBD = 396PS and 630N/m for a B58 !!! With a BMC filter of corse. Don't put a open filter in your car at least it's in the front of the grill. It's only take hot air if the filter is under the hood.. But if you want a really noisy sound go for an Armytrix exhaust.
	Appreciate 0 Quote

09-13-2018, 10:44 PM	#41
DG20 Lieutenant Colonel 967 Rep 1,771 Posts Drives: M340i Join Date: May 2014 Location: Los Angeles, CA iTrader: (5)	Sorry about the confusion here, I truly have no idea why I wrote solved when really nothing was done My exhaust does crackle, but it doesn't explosively pop and bang like it did before
	Appreciate 0 Quote

02-05-2019, 04:12 PM	#42
White_Knight_M235i Registered 2 Rep 2 Posts Drives: 2015 M235i Join Date: Dec 2018 Location: Ny iTrader: (0)	was there ever a fix to it??
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02-06-2019, 12:31 AM	#43
vinzcast21 Lieutenant 161 Rep 446 Posts Drives: F30 340i MY2017 Join Date: Jul 2018 Location: canada iTrader: (0)	i did a reso delete and all the pops come ut! __________________ ================================= Mod bug will bite you if you buy a BMW =================================
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02-06-2019, 07:15 AM	#44
Rebound Second Lieutenant 153 Rep 260 Posts Drives: F33: The 435i Convertible Join Date: Dec 2017 Location: Oregon iTrader: (0)	Isn't the crackling sound caused by fuel burning inside the exhaust? This doesn't seem like a good thing for your exhaust, performance or mileage. I realize that there are some upstream causes, such as ignition timing changes which tune performance, but the crackling itself is an inefficiency, and not higher performance, right?
	Appreciate 1 Reseg10.50 Quote