Disabling Cold Start

Ghetto2315 · 04-06-2015, 08:17 AM

Has anyone done or does anybody know if you can disable the cold start in the F8X M3/M4? I have muffler and resonator delete and on cold start, it's LOUD. After cold start though, it's just right. In doing a forum search, I've seen that it's possible to code the E46 M3 to disable the cold start, which makes me believe it can be done.

Let me know if you guys have done it or know how to. I was told that perhaps the only way to disable it is to get the ECU flashed. I'd rather not...

Thank you!

Accel Junky · 04-06-2015, 09:03 AM

I'd like to know the same. Love the valves-open cold start sound but if I do any exhaust mods to my stock exhaust I'll need to get rid of the cold start sequence or risk angry neighbors.

As far as I know it is mostly to heat the cats up for emissions, right?

CaryTheLabelGuy · 04-06-2015, 09:35 AM

Quote:

Originally Posted by Accel Junky

I'd like to know the same. Love the valves-open cold start sound but if I do any exhaust mods to my stock exhaust I'll need to get rid of the cold start sequence or risk angry neighbors.

As far as I know it is mostly to heat the cats up for emissions, right?

It is for emissions, correct.

Mandi90TT · 04-06-2015, 09:40 AM

So far only an ECU reflash will do the trick

Ghetto2315 · 04-06-2015, 09:53 AM

Yes, it's for emissions. To warm up the cats.

Drive4Fun · 04-06-2015, 01:45 PM

Flash seems the only way right now. I have mine turned off and if it wasn't it would be terribly loud with the catless dp's and valves open. One thing I noticed is that on cold start the exhaust smell is pretty strong until the car warms up. I still have the secondary cats and once they are warm the smell is a lot less noticeable.

Ghetto2315 · 04-06-2015, 02:48 PM

Quote:

Originally Posted by Drive4Fun

Flash seems the only way right now. I have mine turned off and if it wasn't it would be terribly loud with the catless dp's and valves open. One thing I noticed is that on cold start the exhaust smell is pretty strong until the car warms up. I still have the secondary cats and once they are warm the smell is a lot less noticeable.

What flash do you have?

Drive4Fun · 04-06-2015, 03:48 PM

Gintani

GOLFFRR · 04-06-2015, 04:43 PM

I believe the ESS flash tune does as well, not 100% would have to check with Roman@ESS or Tom@EAS(he is running the ESS flash now)

dreamonm4 · 04-06-2015, 07:46 PM

i agree with Drive4Fun, Gintani ecu flash delete cold start with down pipe and factory exhaust was just little loud, man the car pull very strong like Porsche 911 turbo. that my opinion

Ghetto2315 · 04-06-2015, 08:13 PM

Quote:

Originally Posted by Drive4Fun

Gintani

Got it, thank you.

Did the Gintani flash change your exhaust sound/tone at all? Other than no cold start, obviously.

I hope the sound doesn't change because I am very happy with the tone of mine already. Just want the cold start gone.

//Maniac · 04-06-2015, 08:26 PM

i did my ecu by Enzo Performance and the start is as quiet as could be. even with the downpipes he fabricated the start and idle noise are at a minimum.....until I hit the gas...Then all hell breaks loose!!

Ghetto2315 · 04-07-2015, 08:38 AM

Quote:

Originally Posted by GOLFFRR

I believe the ESS flash tune does as well, not 100% would have to check with Roman@ESS or Tom@EAS(he is running the ESS flash now)

GOLFFRR, don't you have the ESS flash tune now? I could have sworn I saw/read that you installed it...

Drive4Fun · 04-07-2015, 09:28 AM

Quote:

Originally Posted by Ghetto2315

Quote:

Originally Posted by Drive4Fun

Gintani

Got it, thank you.

Did the Gintani flash change your exhaust sound/tone at all? Other than no cold start, obviously.

I hope the sound doesn't change because I am very happy with the tone of mine already. Just want the cold start gone.

I can't say if the tune changed the exhaust sound but the dp's did for sure. Listening to the initial cold start up sound I thought the idle was a little rough but I think my stock cold start was the same way. If I crank the car warm it idles fine.

GOLFFRR · 04-07-2015, 11:12 AM

Quote:

Originally Posted by Ghetto2315

GOLFFRR, don't you have the ESS flash tune now? I could have sworn I saw/read that you installed it...

until the flash are through the port I will stick with the ESS piggy back. I don't want to mess with removing the ECU etc.. not for me. I get so many new cars and my cars are documented and I don't think that is something I want to mess with when it comes time to sell my car. The piggy for me works great. Its a simple mod that is easy to take off and remove for my next car in a matter of moments

Ghetto2315 · 04-07-2015, 11:58 AM

Quote:

Originally Posted by GOLFFRR

Quote:

Originally Posted by Ghetto2315

GOLFFRR, don't you have the ESS flash tune now? I could have sworn I saw/read that you installed it...

until the flash are through the port I will stick with the ESS piggy back. I don't want to mess with removing the ECU etc.. not for me. I get so many new cars and my cars are documented and I don't think that is something I want to mess with when it comes time to sell my car. The piggy for me works great. Its a simple mod that is easy to take off and remove for my next car in a matter of moments

No, I hear you. I'm in the same boat as you.

Btw, I just spoke to Roman at ESS and he confirmed that the piggyback does not disable the cold start. Only the flash.

04-06-2015, 08:17 AM	#1
Ghetto2315 Colonel 831 Rep 2,352 Posts Drives: 16' BMW i8 Join Date: Feb 2012 Location: The REAL Jersey Shore iTrader: (1) Garage List 2001 BMW M3 E46 CON ... [9.50] 2016 BMW i8 [10.00] 2003 JEEP GRAND CHE ... [0.00] 2000 540i SPORT E39 [10.00] 2007 TOYOTA TACOMA ... [0.00]	Disabling Cold Start Has anyone done or does anybody know if you can disable the cold start in the F8X M3/M4? I have muffler and resonator delete and on cold start, it's LOUD. After cold start though, it's just right. In doing a forum search, I've seen that it's possible to code the E46 M3 to disable the cold start, which makes me believe it can be done. Let me know if you guys have done it or know how to. I was told that perhaps the only way to disable it is to get the ECU flashed. I'd rather not... Thank you!
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04-06-2015, 09:03 AM	#2
Accel Junky High on Acceleration 671 Rep 1,439 Posts Drives: 08 M3, 90 GTR, 21 Gladiator Join Date: Mar 2008 Location: Georgia, USA iTrader: (6)	I'd like to know the same. Love the valves-open cold start sound but if I do any exhaust mods to my stock exhaust I'll need to get rid of the cold start sequence or risk angry neighbors. As far as I know it is mostly to heat the cats up for emissions, right?
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04-06-2015, 09:40 AM	#4
Mandi90TT Colonel 2712 Rep 2,371 Posts Drives: BSM 6MT M4 F82 Join Date: Aug 2014 Location: Colorado Springs iTrader: (0)	So far only an ECU reflash will do the trick
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04-06-2015, 09:53 AM	#5
Ghetto2315 Colonel 831 Rep 2,352 Posts Drives: 16' BMW i8 Join Date: Feb 2012 Location: The REAL Jersey Shore iTrader: (1) Garage List 2001 BMW M3 E46 CON ... [9.50] 2016 BMW i8 [10.00] 2003 JEEP GRAND CHE ... [0.00] 2000 540i SPORT E39 [10.00] 2007 TOYOTA TACOMA ... [0.00]	Yes, it's for emissions. To warm up the cats.
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04-06-2015, 01:45 PM	#6
Drive4Fun Private First Class 57 Rep 146 Posts Drives: MW BMW M4 Join Date: Dec 2014 Location: Southeast Louisiana iTrader: (0)	Flash seems the only way right now. I have mine turned off and if it wasn't it would be terribly loud with the catless dp's and valves open. One thing I noticed is that on cold start the exhaust smell is pretty strong until the car warms up. I still have the secondary cats and once they are warm the smell is a lot less noticeable.
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04-06-2015, 03:48 PM	#8
Drive4Fun Private First Class 57 Rep 146 Posts Drives: MW BMW M4 Join Date: Dec 2014 Location: Southeast Louisiana iTrader: (0)	Gintani
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04-06-2015, 04:43 PM	#9
GOLFFRR 10817 Rep 27,600 Posts Drives: GOLFFRR cart Join Date: Mar 2009 Location: we sell BMWs to "ALL" US states iTrader: (4)	I believe the ESS flash tune does as well, not 100% would have to check with Roman@ESS or Tom@EAS(he is running the ESS flash now) __________________ BEFORE YOU BUY YOUR NEXT BMW, EMAIL OUR GUY KOTE FIRST! Kote M Sales:Kotem@bmwofcamarillo.com Cell:805-368-9101 vipfinance@bmwofcamarillo.com for warranties!
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04-06-2015, 07:46 PM	#10
dreamonm4 New Member 11 Rep 22 Posts Drives: 2015 F83 m4 convertible Join Date: Mar 2015 Location: al iTrader: (0)	i agree with Drive4Fun, Gintani ecu flash delete cold start with down pipe and factory exhaust was just little loud, man the car pull very strong like Porsche 911 turbo. that my opinion
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04-06-2015, 08:26 PM	#12
//Maniac Enzo Tuned ECU 152 Rep 179 Posts Drives: Silverstone F80 6MT Join Date: Dec 2014 Location: Long Island NY iTrader: (0)	i did my ecu by Enzo Performance and the start is as quiet as could be. even with the downpipes he fabricated the start and idle noise are at a minimum.....until I hit the gas...Then all hell breaks loose!!
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