Wacky Dee Posted May 28, 2008 Share Posted May 28, 2008 I was considering getting a new O2 sensor installed to help with fuel economy when cruising but will most likely get a PFC installed and tuned soon. Does a tuned PFC take care of everything, making the O2 sensor redundant or would an O2 sensor still be a good idea? I'm not even sure my existing O2 is buggered (I'm getting crap econmy though, 350kms/50l R34 GTT with stage 1 mods) but I don't wanna waste $200 if I don't have to Cheers Link to comment https://www.sau.com.au/forums/topic/221252-new-o2-sensor-needed-if-getting-pfc/ Share on other sites More sharing options...
paulr33 Posted May 28, 2008 Share Posted May 28, 2008 350kms to a tank sounds fine - if the 02 sensor is toast expect around 250kms (absolute max) to a full tank the pfc will support the 02 sensor and use it for fuel economy control 02 feedback can be turned off, but unless your light cruise afrs are done correctly (they should be for $500 tune) then youll have poo economy ie it might make 220rwkw but youll use a full tank in 200kms, that to me would indicate 02 feedback is off and cruise afr's have been tuned or the sensor is toast Link to comment https://www.sau.com.au/forums/topic/221252-new-o2-sensor-needed-if-getting-pfc/#findComment-3900573 Share on other sites More sharing options...
Wacky Dee Posted May 28, 2008 Author Share Posted May 28, 2008 Sorry I mean 300km/50l ... Sooo in short, with properly tuned AFRs on PFC I shouldn't need to worry about the O2 sensor? Link to comment https://www.sau.com.au/forums/topic/221252-new-o2-sensor-needed-if-getting-pfc/#findComment-3901962 Share on other sites More sharing options...
paulr33 Posted May 28, 2008 Share Posted May 28, 2008 yes, if the tuner takes the time to do on road AFR tuning (not all do, ask if your tuner will) and goes to the effort to tune the light cruise then you can get better than std 02 feedback economy i was able to get over 550km's to a full tank of highway driving with 02 feedback off Link to comment https://www.sau.com.au/forums/topic/221252-new-o2-sensor-needed-if-getting-pfc/#findComment-3902122 Share on other sites More sharing options...
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