Exhaust valves no longer open after I switch from Efficient to Sport Plus engine mode

rborane · 10-03-2019, 01:38 PM

When I put the car from efficient mode (M1) to Sport Plus mode (M2) my car no longer opens the exhaust valves, and the active sound almost sounds like it went away as well.

I have no idea what cause this but it just started doing it out of the blue, and the valves really wont open at all anymore in sport plus. Anyone else experience this or have any ideas how to resolve?

Tommy L Garage · 10-03-2019, 02:02 PM

Maybe the valve connector got unplugged? Get under your muffler and check

rborane · 10-03-2019, 02:31 PM

Quote:

Originally Posted by Tommy L Garage

Maybe the valve connector got unplugged? Get under your muffler and check

Would that effect the active sound as well? The car is definitely a lot quieter on the interior now and I cannot hear the active sound as well.

backagain · 10-04-2019, 12:46 PM

Quote:

Originally Posted by Tommy L Garage

Maybe the valve connector got unplugged? Get under your muffler and check

Or the fuses #146/147 are blown? Small probability, but you can check them out in the fuse box in the trunk.

N1rve · 10-04-2019, 04:15 PM

The valve is electronically controlled with a motor and that could have gone bad.

rborane · 10-04-2019, 08:45 PM

Quote:

Originally Posted by backagain

Or the fuses #146/147 are blown? Small probability, but you can check them out in the fuse box in the trunk.

Is this for active sound as well? I am thinking my active sound is what isn’t working anymore. The exhaust seems like the valves still open but the interior is much quieter. Where is the fuse box in the trunk?

SakhirM4 · 10-04-2019, 09:06 PM

Maybe your M1 and M2 settings changed. Check them in iDrive.

rborane · 10-05-2019, 01:17 AM

Quote:

Originally Posted by SakhirM4

Maybe your M1 and M2 settings changed. Check them in iDrive.

Wish it were that easy, but no that’s not it

oinkoink · 10-06-2019, 03:19 AM

Have you confirmed that the exhaust flaps remain fully closed after you switch to sport plus? The motors could be functioning properly but the flaps might get stuck. In this case, you would probably see some movement of the flaps. You could ask someone to examine the flaps once you switch to sport plus and check for any movement.

Personally I've disconnected the flap motors so they are open at all times

RoundelM3 · 10-06-2019, 10:34 AM

Have you considered taking your car to a dealership or reputable Independent shop to have them check it out?

icegrill · 10-06-2019, 11:04 AM

Quote:

Originally Posted by RoundelM3

Have you considered taking your car to a dealership or reputable Independent shop to have them check it out?

Are you out of your mind!?😂

backagain · 10-06-2019, 07:36 PM

Quote:

Originally Posted by rborane

Is this for active sound as well? I am thinking my active sound is what isn’t working anymore. The exhaust seems like the valves still open but the interior is much quieter. Where is the fuse box in the trunk?

No, active sound is controlled by its own module, located in the sidewall (driver side) of the trunk. But personally I don't like active sound and had it purposely disabled.

You have to lift the floor panel to expose the fuse box. BTW, if you disconnect those two fuses when the flaps are open, you can have them permanently open regardless of the drive modes.

ArialBlack · 10-08-2019, 11:33 PM

The car only opens valves at 3.5k rpms and above in Sport/Sport+ with OEM settings. This is consistent with the ASD.

rborane · 10-09-2019, 11:04 AM

Quote:

Originally Posted by Yas3__

The car only opens valves at 3.5k rpms and above in Sport/Sport+ with OEM settings. This is consistent with the ASD.

Really? That is the first ive heard of that.

N1rve · 10-09-2019, 03:03 PM

If you have a non-ZCP car, put the car to "ON" but not start the car, go into Sport/Sport Plus for Engine and then press the gas pedal all the way down. You should hear a mechanical noise. Start engine, engine should roar.

rborane · 10-09-2019, 03:15 PM

Quote:

Originally Posted by N1rve

If you have a non-ZCP car, put the car to "ON" but not start the car, go into Sport/Sport Plus for Engine and then press the gas pedal all the way down. You should hear a mechanical noise. Start engine, engine should roar.

What does this procedure do?

N1rve · 10-09-2019, 03:56 PM

Quote:

Originally Posted by rborane

What does this procedure do?

It forces the valves open, so you know if the the valve isn't opening at all.

hellokitty · 10-09-2019, 05:05 PM

Quote:

Originally Posted by Yas3__

The car only opens valves at 3.5k rpms and above in Sport/Sport+ with OEM settings. This is consistent with the ASD.

i dont think this is the case. when i low speed cruise in sport or sport+ in 1st or 2nd gear, the valves are open. the valves close when i get into the higher gear and RPM range (not WOT) to avoid drone.

gatorfast · 10-09-2019, 06:01 PM

Quote:

Originally Posted by hellokitty

Quote:

Originally Posted by Yas3__

The car only opens valves at 3.5k rpms and above in Sport/Sport+ with OEM settings. This is consistent with the ASD.

i dont think this is the case. when i low speed cruise in sport or sport+ in 1st or 2nd gear, the valves are open. the valves close when i get into the higher gear and RPM range (not WOT) to avoid drone.

For the base tune the valves do not open immediately when in sport/sport+ like they do for the zcp.

rborane · 10-09-2019, 06:28 PM

Quote:

Originally Posted by gatorfast

For the base tune the valves do not open immediately when in sport/sport+ like they do for the zcp.

So with the factory tune, the valves dont open until 3.5K even in sport/sport plus??

gatorfast · 10-09-2019, 08:25 PM

Quote:

Originally Posted by rborane

Quote:

Originally Posted by gatorfast

For the base tune the valves do not open immediately when in sport/sport+ like they do for the zcp.

So with the factory tune, the valves dont open until 3.5K even in sport/sport plus??

Not sure if that's the exact rpm but it def needs to be up there along with other throttle input parameters.

Basically if you are sitting still with a base tune car and go from efficient to sport mode, nothing will happen to the valves. But if you are sitting still with ZCP or CS tune and go from efficient to sport you will immediately hear the valves open even before driving off.

///M-pressed · 10-10-2019, 04:49 AM

I have a ZCP and I can't figure out if the valves are opening. I've tried to following to disconnect the valves:

1. Start the clutch without the clutch engaged so that the ignition is turned on but not the engine
2. Put the engine into sport +
3. Tap the accelerator

I can't hear the valves opening when I tap the accelerator

10-03-2019, 01:38 PM	#1
rborane Captain 241 Rep 792 Posts Drives: BMW M4 Join Date: Mar 2013 Location: AZ iTrader: (3)	Exhaust valves no longer open after I switch from Efficient to Sport Plus engine mode When I put the car from efficient mode (M1) to Sport Plus mode (M2) my car no longer opens the exhaust valves, and the active sound almost sounds like it went away as well. I have no idea what cause this but it just started doing it out of the blue, and the valves really wont open at all anymore in sport plus. Anyone else experience this or have any ideas how to resolve?
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10-03-2019, 02:02 PM	#2
Tommy L Garage Colonel 2516 Rep 2,079 Posts Drives: 2017 YMB M3 6MT CP EP VP Join Date: Dec 2008 Location: Woodbridge, NJ iTrader: (2)	Maybe the valve connector got unplugged? Get under your muffler and check
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10-04-2019, 04:15 PM	#5
N1rve Racecar Driver 1285 Rep 1,954 Posts Drives: BMW M4 Join Date: Mar 2019 Location: Beverly Hills, California iTrader: (2) Garage List 2019 BMW M4 [9.63]	The valve is electronically controlled with a motor and that could have gone bad. __________________ N1rve 2019 BMW ///M4 - Alpine White \| Sakhir Orange/Black Leather \| M-DCT \| Executive Package \| 19" Black 437M Wheels \| Carbon Fiber Trim \| Sunroof \| Active Blind Spot \| Heated Steering Wheel \| Adaptive M Suspension
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10-04-2019, 09:06 PM	#7
SakhirM4 Major General 10785 Rep 8,852 Posts Drives: '15 SO M4/'20 Z4 M40i Join Date: Jul 2014 Location: Austin, TX iTrader: (0) Garage List 2020 BMW Z4 M40i [10.00] 2015 BMW M4 [8.76]	Maybe your M1 and M2 settings changed. Check them in iDrive. __________________ Tejas Chapter, BMW CCA, mem #23915, President 27 years, www.tejaschapter.org
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10-06-2019, 03:19 AM	#9
oinkoink New Member 15 Rep 14 Posts Drives: F82 M4 -2015 Join Date: Sep 2019 Location: Finland iTrader: (0)	Have you confirmed that the exhaust flaps remain fully closed after you switch to sport plus? The motors could be functioning properly but the flaps might get stuck. In this case, you would probably see some movement of the flaps. You could ask someone to examine the flaps once you switch to sport plus and check for any movement. Personally I've disconnected the flap motors so they are open at all times
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10-06-2019, 10:34 AM	#10
RoundelM3 Major General 1835 Rep 6,990 Posts Drives: 15 F80 M3, 22 G01 X3 30i Join Date: Apr 2010 Location: Clayton, NC iTrader: (2) Garage List 2022 BMW X3 [9.83] 2015 BMW M3 [6.50]	Have you considered taking your car to a dealership or reputable Independent shop to have them check it out? __________________ 2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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10-08-2019, 11:33 PM	#13
ArialBlack Enlisted Member 16 Rep 37 Posts Drives: F80 M3 Join Date: Apr 2019 Location: Yamoussoukro iTrader: (0)	The car only opens valves at 3.5k rpms and above in Sport/Sport+ with OEM settings. This is consistent with the ASD.
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10-09-2019, 03:03 PM	#15
N1rve Racecar Driver 1285 Rep 1,954 Posts Drives: BMW M4 Join Date: Mar 2019 Location: Beverly Hills, California iTrader: (2) Garage List 2019 BMW M4 [9.63]	If you have a non-ZCP car, put the car to "ON" but not start the car, go into Sport/Sport Plus for Engine and then press the gas pedal all the way down. You should hear a mechanical noise. Start engine, engine should roar. __________________ N1rve 2019 BMW ///M4 - Alpine White \| Sakhir Orange/Black Leather \| M-DCT \| Executive Package \| 19" Black 437M Wheels \| Carbon Fiber Trim \| Sunroof \| Active Blind Spot \| Heated Steering Wheel \| Adaptive M Suspension
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10-10-2019, 04:49 AM	#22
///M-pressed Lieutenant 276 Rep 417 Posts Drives: E46 M3, F82 M4 Join Date: Jan 2011 Location: Sydney & Melbourne Australia iTrader: (0)	I have a ZCP and I can't figure out if the valves are opening. I've tried to following to disconnect the valves: 1. Start the clutch without the clutch engaged so that the ignition is turned on but not the engine 2. Put the engine into sport + 3. Tap the accelerator I can't hear the valves opening when I tap the accelerator __________________ F82 M4 \| 6-speed manual \| PP performance Stage 2 tune \| Re-valved Bilstein B16s \| VRSF midpipe \| OEM CS front splitter \| OEM GTS hood \| OEM M-performance rear diffuser\| Evolve tuning catless downpipes \| 310rwkw (415rwhp)
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