is that -16% idle and -20% cruise? suggests that the computer is constantly
removing xx% fuel to maintain its stioch. (rich)
or is that +16% idle and +16% cruise? suggests that the computer is
constantly add xx% fuel to maintain its stioch. (lean)
there is a big difference.
if you are having the +xx% yes increase the pressure to 60psi (by your gauge)
and referify your fuel trims... if they increase then your on the right track.
a -4% to -2% is desirable.
if you are having the -xx% yes decrease the pressure to 50psi (by your gauge)
and referify your fuel trims... if they decrease then your on the right track.

3psi is a 5% increase which should better your trims (5%)... a tamper-resistant T-5
bit is needed to adjust your pressure regulator.

airdeano