Quote:
Originally Posted by beemw
Somebody correct me if Im wrong, but I think the jbd works like the jb+(for the i) it trick your car into thinking your in higher altitudes so you run more boost.
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No, I believe the JBD works like most diesel tune boxes (Mike correct me if I am wrong here). The JBD intercepts the high pressure rail sensor signal (that's what the JBD plugs into) and it sends a different signal to the ECU which demands more fuel pressure, in otherwords it tricks the ECU into raising the pressure on the high pressure fuel pump which results in more fuel being delivered and that's where the power comes from.
As I understand it, that's NOT a remap in the traditional sense. Diesel tune boxes do nothing more then by-pass the rail sensor and deliver a signal to the ECU that tells it to raise fuel pressure vs the ECU giving a comand based on it being reprogrammed.