Originally Posted by
ssvolvo
Fuel trims are the percentage that the ecm is adjusting injector pulse width rich or lean from stoichic. As the switching point of a narrow band O2 is 450mv then we are working with 14.65? to 1. I don't believe this number is able to be changed with E40. Obviously your O2 sensors must be enabled.
In tables B1511,B1512 one can adjust how far off stoichic the ecm will compensate from base. Maybe easier said how far off of your map.
Gelf, You've helped me big time with your tutorials. What are we thinking of doing?
Can one disable the MAF and run fuel trims off the MAP only? I don't see why not. Can one compensate bank to bank? I don't think so.
John