I hear no burbles on jb4

[ColonelAdama]

It’s probably the exhaust flap. It greatly reduces burble when closed. I hardly hear mine when closed.

JB4 can control it in 3 ways
1. Always closed
2. Always open
3. Open only in Sport

You can adjust the setting in two ways

First Way:
On your turn signal stock - press and hold the “BC” button until the turn signal flashes. A left turn signal = always closed. A right turn signal = always open. Both Turn signals = open only during sport mode (make sure you’re not in sport mode or it’ll get confused it seems). Repeat the process until you are on the desired setting.

My JB4 is going on this afternoon. So you're telling me I can do the fuse-pull mod, run valve open all the time, and just disable burbles even in sport mode? Would I retain the same sport-mode engine response?

This is my ideal - I want my valve always open with touchy throttle response but sometimes burbles are too much when catless...

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[Evolution]

My JB4 is going on this afternoon. So you're telling me I can do the fuse-pull mod, run valve open all the time, and just disable burbles even in sport mode? Would I retain the same sport-mode engine response?

This is my ideal - I want my valve always open with touchy throttle response but sometimes burbles are too much when catless...

There is no disabling burbles with the JB4. They are just a lot less noticeable with the one exhaust flap closed.

 

[ColonelAdama]

There is no disabling burbles with the JB4. They are just a lot less noticeable with the one exhaust flap closed.

Got it, thanks!

 

[FuzzyRev]

Does this BC button trick only work with the JB4 or on a stock vehicle as well. I've never heard of it before...

 

[Evolution]

Does this BC button trick only work with the JB4 or on a stock vehicle as well. I've never heard of it before...

Just with the JB4. It has the ability to send a CAN message to control the flap.

 

[mksupbra]

There is no disabling burbles with the JB4. They are just a lot less noticeable with the one exhaust flap closed.

so Left signal on BC is both flaps open correct? i feel like its only one flap open now hence why its not as loud

 

[Evolution]

so Left signal on BC is both flaps open correct? i feel like its only one flap open now hence why its not as loud

Correct, left blinker flashing should make it loud all the time. Have you tried making the left blinker flash, shut the car off and turn it back on? Should take a few seconds after it fires up for the valve to open. Its very noticeable on cold start.

 

[zrk]

so Left signal on BC is both flaps open correct? i feel like its only one flap open now hence why its not as loud

There is only one flap.

 

[Jesse DaBears]

There is only one flap.

I heard you have two flaps O_O

 

[dreadforge]

The amount of wrong information in this thread is too damn high

 

[D K]

I heard you have two flaps O_O

Where's the other flap?

 

[zrk]

The amount of wrong information in this thread is too damn high

I just read through this entire thread. The only misinformation I can find is your comment.

 

[dreadforge]

I just read through this entire thread. The only misinformation I can find is your comment.

Ja Kommandant

 

[omfgzilla]

Congrats!!!!! Ive been trying to find a way to turn that shit off, but i guess il have to burn 1500 buck

 

[D K]

My exhaust flap seems permanently closed.

I've tried doing the BC thing and also double tapped the CANFlap gauge. The left blinker signal blinkeded.

Turned the car on and off and the exhaust flap stays closed.

Any ideas?

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