i have changed all sensor throttle body and installed new catalytic in honda 2007 steermatic, but fuel carbon is coming in exhaust due to rich what should i do.
in City the average is giving 10 km, and on highway it giving me 15 or 16 km. which is fine for automatic.
but the carbon from exhaust is coming, i went to Abid electrician which is situated near preedy station adjacent to national car oil depo in karachi, he checked the plug and said new NGK plug is not good, buy used shershah or maxiline.
any one had this problem face like this
