hey guys what is your air fuel ratio at on a stock gsr i think mine is too rich

 

do you have a wide band O2 sensor and gauge to read yours? If so, what are your readings?

 

13.1 sniffing the tailpipe

 

is that at idle?

 

make sure you check it when the car is fully warmed up, when the coolant is cold the ECU follows enrichment tables and add's extra fuel until the coolant reaches a certain point, make sure the heater and ac is off too. Best bet is to put a fresh set of spark plugs in and learn how to read them, or buy a used wideband and be done with it. From what I have learned the tailpipe sniffer will read a point leaner than close to the head where it should be, so 12.0 is pretty pig rich for a stock car, should be in the 15's.