6/12/2023 0 Comments Jb4 Interface Program![]() ![]() ![]() Target will never drop below stock 7-8psi target. enter 10psi for 1st gear and you will never target more than 10psi in 1st gear. Here is a list of changes from the previous firmware.ġ) If FutureUseD = 1 steering wheel controls are disabled.Ģ) Changed 1st/2nd gear boost reduction to a boost limit. ![]() If you have no idea what the above means then don't do anything. Software and firmware are paired so you need both! You also need to have the JB3/4 USB cable to be able to update the JB4 There is new software firmware available for your JB4 One of the added features of this new firmware is increased top end performance on map 1
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