R31 Gagz Posted August 17, 2007 Share Posted August 17, 2007 (edited) Hey All, Had my 32 gtr up on the hoist the other day and noticed the O2 sensor wasnt hooked up, the plug was just sitting there with no connecting plug to the loom\wire harness in sight. Im running an Apexi PFC and it seems to run fine without it, does it need to be connected though?? Im thinking I might get a bit better fuel economy if it was hooked up. Cheers! Gagz Edited August 17, 2007 by R31 Gagz Link to comment https://www.sau.com.au/forums/topic/181265-does-apexi-pfc-use-o2-sensors/ Share on other sites More sharing options...
The Mafia Posted August 17, 2007 Share Posted August 17, 2007 you can actually turn the feedback off on the powerfc and then it won't worry about adjusting the fuel in closed\open loop mode. Link to comment https://www.sau.com.au/forums/topic/181265-does-apexi-pfc-use-o2-sensors/#findComment-3293746 Share on other sites More sharing options...
Cubes Posted August 17, 2007 Share Posted August 17, 2007 They run fine without it and return decent fuel economy providing its been tuned well. e The o2 sensors often get disconnected because they are shagged and when shagged cause driveability problems. Link to comment https://www.sau.com.au/forums/topic/181265-does-apexi-pfc-use-o2-sensors/#findComment-3293753 Share on other sites More sharing options...
R31 Gagz Posted August 17, 2007 Author Share Posted August 17, 2007 Cool, get a bit over 500km per tank on the highway, not sure about town but i think its pretty good. Thanks guys. Gagz Link to comment https://www.sau.com.au/forums/topic/181265-does-apexi-pfc-use-o2-sensors/#findComment-3293815 Share on other sites More sharing options...
R31Nismoid Posted August 17, 2007 Share Posted August 17, 2007 If you got to the EPA etc, you'll need them connected. Only catch there Link to comment https://www.sau.com.au/forums/topic/181265-does-apexi-pfc-use-o2-sensors/#findComment-3294932 Share on other sites More sharing options...
Richieb Posted August 17, 2007 Share Posted August 17, 2007 They tend to mess-up the tuning a little, but then again depends on the state of tune you are running. Me, I dont use them. Link to comment https://www.sau.com.au/forums/topic/181265-does-apexi-pfc-use-o2-sensors/#findComment-3294934 Share on other sites More sharing options...
Beer Baron Posted August 19, 2007 Share Posted August 19, 2007 R31 Gagz said: Hey All,Had my 32 gtr up on the hoist the other day and noticed the O2 sensor wasnt hooked up, the plug was just sitting there with no connecting plug to the loom\wire harness in sight. Im running an Apexi PFC and it seems to run fine without it, does it need to be connected though?? Im thinking I might get a bit better fuel economy if it was hooked up. Cheers! Gagz I think you are confusing the O2 sensors with the cat temp sensor. I would say what you say was the cat temp sensor disconnected. it doesn't matter at all. it's purely there to set off the cat temp warning light to tell you the cat is getting hot. the O2 sensors can be seen inside the engine bay from above. one in each dump pipe and it's best to have them connected for fuel economy but it's no big problem if they are disconnected and you have an ecu (like power FC) that you can tune the light load cruise area of the map. Link to comment https://www.sau.com.au/forums/topic/181265-does-apexi-pfc-use-o2-sensors/#findComment-3297224 Share on other sites More sharing options...
R31 Gagz Posted August 20, 2007 Author Share Posted August 20, 2007 Thanks but its definitely the O2...I know what one looks like as Ive replaced three of them in the past on other cars and I could see the unplugged cable leading straight to the O2 that was connected to my dump pipes....couldn't see it from above as Ive got two turbos and two 4" turbo dump pipes blocking my vision Cheers! Gagz Link to comment https://www.sau.com.au/forums/topic/181265-does-apexi-pfc-use-o2-sensors/#findComment-3299768 Share on other sites More sharing options...
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