apexi

i hope someone can help, does anyone know how to use/tune the safc or can help me under stand how it works a little better. its like the car will have its good days and will have its bad ones. my engine is a sohc non vtec 1.6 that came out of an 89 crx. i have put the motor and ecu both into my car. my car is a 92 honda civic. sorry if this is to long hope someone can help thanks