[Fourth]

I can't feel any difference after turn the jb4 on, I have BMS air intake and 200cell downpipe, so I used Map 2, it's that right? some says Jb4 can bring a lot power(allmost 50-60 whp) that should be obviously, why I can't feel it? what your guys situation? When I turn on the jb4, the shift gear light glinted. Any things wrong???

[Mike@N54Tuning.com]

If you need tuning help do a JB4 datalog and post it on BMS' support forum. Perhaps the JB4 is holding back boost because it senses something unsafe with your vehicle.

Mike

[mike@x-ph.com]

Originally Posted by Fourth

I can't feel any difference after turn the jb4 on, I have BMS air intake and 200cell downpipe, so I used Map 2, it's that right? some says Jb4 can bring a lot power(allmost 50-60 whp) that should be obviously, why I can't feel it? what your guys situation? When I turn on the jb4, the shift gear light glinted. Any things wrong???

Do a log from 2000 rpm til red line with map 2 and post it we can definitely tell if the jb4 is functioning correctly or not.