Originally Posted by darkrider
I just picked up a used JB+ on the classifieds. What seems to be the consensus on how much you can run over default before you start tripping tuner codes?
Before I got it, the car was running good (no codes) until I installed the JB+ 50
% and I got leak codes. I was blaming the JB+ but it really was a boost leak. After I fixed the leak, I was able to run it 75
% with no codes. I gave it a try 100
% with the bypass and it was REALLY pulling but I didn't like the idea of bypassing the solenoid so I went back to 75%. Two Months later I purchased the JB4