JB4 CanBus exhaust valves closing by themselves

[BPe90M3]

This is really weird. My JB4 CanBus was working perfectly, however, today, I noticed that the valves close by themselves for some reason. For example, when idling, if I go through the system and open the valves, they will only stay open for about 30 seconds then they close by themselves. Also when driving, when I keep them open, it seems like they stay open for first and second gear, but close in third and close on downshifts. Anyone have a clue what this could be?

[ItsaGoose]

This doesn't happen to me. Does the canbus setting change at the unit or does the car just close its own valves

[BPe90M3]

Originally Posted by ItsaGoose

This doesn't happen to me. Does the canbus setting change at the unit or does the car just close its own valves

The car literally just shuts the valves by itself regardless if i am on the left blinker setting.

[BPe90M3]

So i've been screwing around with it and just realized that this only happens on map 0. Map 2 works perfectly. Is this a normal JB4 setting?

[al3xander]

Map 0 is stock so it'll operate how the car normally works the valves

[Lojs]

If you want to run stock power, use map 4. It will still allow you to use all the other canbus features incl. exhaust valves

[CaryTheLabelGuy]

Map 0 is full bypass mode. It will disable all CANBus control. If you want stock boost but want to retain CANBus features, use map 4.

[BPe90M3]

Got it. I didnt realize that map 4 was stock tuning with Canbus activated. Thank you all for the help!

[mike@x-ph.com]

Originally Posted by CaryTheLabelGuy

Map 0 is full bypass mode. It will disable all CANBus control. If you want stock boost but want to retain CANBus features, use map 4.

This ^

[hexone]

bump

[dmk08]

Originally Posted by hexone

bump

Why are you bumping this here? If you have technical issues with JB4 take them to their forum. They don't troll here.