Delay in MPPSK valve opening with cold start

bimmer456 · 10-29-2018, 07:44 PM

So there is a delay before the valve opens, I was certain when I first got the MPPSK this was not the case. I was told it was to get the cat up to temp faster. Is there a way to have it open and stay open, maybe with coding? Don't want to have to wait or rev it past 4K.

ishowerinjager · 10-29-2018, 09:26 PM

This has always been the case, it's for the reasons your described with the cats.

Ive read a few place that it can be permanently opened with either coding or jb4

Beek · 10-29-2018, 09:44 PM

I think you can just unplug the wiring to the valves when they are open and they will stay that way, or do the golf T mod. With the waste gate and exhaust valves open your cold start will be VERY loud.

bimmer456 · 10-30-2018, 12:47 PM

Quote:

Originally Posted by Beek

I think you can just unplug the wiring to the valves when they are open and they will stay that way, or do the golf T mod. With the waste gate and exhaust valves open your cold start will be VERY loud.

I also found when parking that if I'm in comfort and then switch to sport while parked I have to tap the throttle to open the valve.

Beek · 10-30-2018, 07:10 PM

Quote:

Originally Posted by bimmer456

I also found when parking that if I'm in comfort and then switch to sport while parked I have to tap the throttle to open the valve.

Sometimes I also have to blip the throttle to get the valves to open, maybe twenty percent of the time.

xlover · 10-30-2018, 10:06 PM

Quote:

Originally Posted by bimmer456

Quote:

Originally Posted by Beek

I think you can just unplug the wiring to the valves when they are open and they will stay that way, or do the golf T mod. With the waste gate and exhaust valves open your cold start will be VERY loud.

I also found when parking that if I'm in comfort and then switch to sport while parked I have to tap the throttle to open the valve.

Mine does this as well.

Abzynthe · 10-31-2018, 09:48 AM

Quote:

Originally Posted by Beek

... With the waste gate and exhaust valves open your cold start will be VERY loud.

I agree, especially in a garage aswell

MG 228i · 10-31-2018, 04:47 PM

Unplugged valves with MPPSK

DG20 · 11-01-2018, 10:32 PM

My MPPSK exhaust is very unpredictable. The thing that pisses me off the most is that both valves open up whenever i'm below 13mph. So even if i'm in comfort mode, its pretty damn loud and droney from 0-13mph.

dirkules88 · 11-02-2018, 12:02 AM

I'm running a JB4 so I can open them manually prior to engine start via BC button. Trust me you really need the option of starting up with valves closed. I have underground parking under my building and the cold start is absolutely savagely loud with valves open. If I left somewhere at 1am... well good morning neighbourhood haha

bimmer456 · 11-02-2018, 08:39 AM

Quote:

Originally Posted by AW F30

My MPPSK exhaust is very unpredictable. The thing that pisses me off the most is that both valves open up whenever i'm below 13mph. So even if i'm in comfort mode, its pretty damn loud and droney from 0-13mph.

My valve is always closed in comfort unless the engine revs past 4K.

bimmer456 · 11-02-2018, 08:40 AM

Quote:

Originally Posted by dirkules88

I'm running a JB4 so I can open them manually prior to engine start via BC button. Trust me you really need the option of starting up with valves closed. I have underground parking under my building and the cold start is absolutely savagely loud with valves open. If I left somewhere at 1am... well good morning neighbourhood haha

I wasn't sure if the valve was open on cold start but that would still be an option as comfort is the default mode.

kern417 · 11-02-2018, 09:11 AM

It's for noise. Not your cat.

dirkules88 · 11-02-2018, 03:43 PM

Quote:

Originally Posted by bimmer456

I wasn't sure if the valve was open on cold start but that would still be an option as comfort is the default mode.

They're usually closed as you described in your first post and then open up after about a minute or so if you have it in Sport or Sport+ on the MPPSK.

JB4 overrides this driving mode dependency so I can do cold starts valves open and it's absolutely brutal haha

bimmer456 · 11-02-2018, 03:54 PM

Quote:

Originally Posted by dirkules88

Quote:

Originally Posted by bimmer456

I wasn't sure if the valve was open on cold start but that would still be an option as comfort is the default mode.

They're usually closed as you described in your first post and then open up after about a minute or so if you have it in Sport or Sport+ on the MPPSK.

JB4 overrides this driving mode dependency so I can do cold starts valves open and it's absolutely brutal haha

Yeah I don't like driving mode dependency would like the ability to drive in sport + with valve closed for that sleeper capability power without noise/sound.

10-29-2018, 07:44 PM	#1
bimmer456 Major General 2959 Rep 5,989 Posts Drives: 340i Join Date: Nov 2016 Location: Pasadena, CA iTrader: (0)	Delay in MPPSK valve opening with cold start So there is a delay before the valve opens, I was certain when I first got the MPPSK this was not the case. I was told it was to get the cat up to temp faster. Is there a way to have it open and stay open, maybe with coding? Don't want to have to wait or rev it past 4K.
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10-29-2018, 09:26 PM	#2
ishowerinjager Second Lieutenant 111 Rep 216 Posts Drives: 2017 340i M Performance Editio Join Date: Mar 2017 Location: Edmonton iTrader: (0)	This has always been the case, it's for the reasons your described with the cats. Ive read a few place that it can be permanently opened with either coding or jb4 __________________ 2017 340i M Performance Edition: Fashion Grey, MPPSK, M performance front splitter, rear diffuser, side sills, black grille, CF spoiler, 405M 20s, 8AT, full Marino interior and dash, adaptive suspension
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10-29-2018, 09:44 PM	#3
Beek Major 707 Rep 1,170 Posts Drives: Most folks crazy. Join Date: Dec 2015 Location: The Twin Cities iTrader: (0)	I think you can just unplug the wiring to the valves when they are open and they will stay that way, or do the golf T mod. With the waste gate and exhaust valves open your cold start will be VERY loud. __________________ '16 340xi Mineral Grey/Black Leather, MPSS on 18" 398 Orbit Grey wheels, ZF 8HP50, MPPSK+CF Tips, ZTR, ZMP, ZTP, ZCW, ZDA, ZDB, Black Kidney Grilles. '09 Outback for a beater and grocery getter.
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10-31-2018, 04:47 PM	#8
MG 228i First Lieutenant 156 Rep 349 Posts Drives: Z4 m40i, 340i 6MT, i3S Join Date: Aug 2014 Location: Los Angeles iTrader: (0)	Unplugged valves with MPPSK __________________ 2017 340i - ZMT, ZTR, Z11, Z08
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11-01-2018, 10:32 PM	#9
DG20 Lieutenant Colonel 967 Rep 1,771 Posts Drives: M340i Join Date: May 2014 Location: Los Angeles, CA iTrader: (5)	My MPPSK exhaust is very unpredictable. The thing that pisses me off the most is that both valves open up whenever i'm below 13mph. So even if i'm in comfort mode, its pretty damn loud and droney from 0-13mph.
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11-02-2018, 12:02 AM	#10
dirkules88 Private 16 Rep 62 Posts Drives: 340i MPPSK Join Date: Jul 2018 Location: Berkshire iTrader: (0)	I'm running a JB4 so I can open them manually prior to engine start via BC button. Trust me you really need the option of starting up with valves closed. I have underground parking under my building and the cold start is absolutely savagely loud with valves open. If I left somewhere at 1am... well good morning neighbourhood haha
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