Quote:
Originally Posted by tomtom
if it is a closed loop, then why is the fuel wire intercepted by the JB3 and why is fuel pressure increase with this tune?
|
Biasing the O2 sensors allows you to change the air/fuel ratio, and altering the fuel pressure signal allows you to pass in more fuel without the ECU knowing. It also extends the limits of the fuel system. Neither is of much concern in the 2-3 psi range.
Mike