I'm trying to tune my car for some better mpgs because I've been averaging about 10mpg lately with mixed hwy and city driving. I've turned the TC to lock earlier and advanced the crap out of my timing in the lower rpms at all MAP values but mainly the 45-60 range where my car is usually at while I'm cruising. I was wondering if putting the most spark advance without knock nets the best mpgs because that is what I've been doing and I'm just trying to make sure that it's not wrong. Also I've been tinkering with the DFCO. I thought DFCO would either null the blms or make them lean but while I'm in my DFCO range I never see that happen. I never see my timing get retarded either, it'll just float around 34* on a decel. Is my DFCO wrong or something?


My values are:

DFCO Enable RPM Threshold: 1700rpm
" " Disable " ": 950
DFCO Enable MAP Threshold: 28kpa
" " Disable " ": 70
DFCO Disable RPM Decrease Threshold: 3500rpm/sec
DFCO Enable Coolant Temp. Threshold: 20*C
DFCO Enable MPH Threshold: 14mph
DFCO Enable Delay Timer: 0.0sec
DFCO Spark Retard: 30*

I'm shooting for a aggressive DFCO system that'll basically cut fuel when I let go of the throttle at cruising RPMs but not while I'm going too fast so I don't have a enormous amount of vacuum. My car idles at 76kpa with 12gps airflow according the the MAF sensor. The enable MAP value of 28kpa is basically when my car is about 75mph at highway speeds. Are my values backwards always disabling or is it just activating and I'm not looking for it correctly?