By Ride5000 at http://www.romraider.com/forum/viewtopic.php?t=1542&start=30
If you see values getting closer to zero as RPM rises, then adjust injector latency.
If the trim is more NEGATIVE as rpm rises then the ecu is injecting MORE fuel than expected in that range. That means that the ecu is injecting LESS fuel at lower rpms than it “thinks” it is, which means that the latency could be adjusted to a LARGER value so that the effective duty cycle is increased.
Conversely, if the trim is more POSITIVE as rpm rises then the ecu is injecting LESS fuel than expected in that range. That means that the ecu is injecting MORE fuel at lower rpms than it “thinks” it is, which means that the latency could be adjusted to a SMALLER value so that the effective duty cycle is decreased.
Since it is a static duty cycle offset, adjusting latency will have the greatest effect when duty cycles are lowest.
