I could never pass up on an experiment! Unfortunately, since the wife has the Prius now, I'm no longer allowed to experiment with her car. I am working on sometning for the Del Sol, but for better FE, not more power. The target AFR's for the hondas are stioch (14.7:1) only at high vacuums above 18 in hg. Below 18 in hg, the targer afr is 12.46:1. This is probably for good throttle response and relies on the O2 sensor to trim it back. Im planning on changing the target back to 14.7:1 to see if there is an increase in FE. I might also play with the AIT and ECT multipliers to decrease the richness at cold air and coolent temps. Presumably these are done to prevent driveability issues in cold weather but they probably overdo it just to be sure. I am hoping to squeeze out a few more MPG while still meeting the emmissions requirements.

It's a Wonderful Day for Science!