el-dub801 Member 44 Member For: 12y 8m 15d Gender: Male Location: Wollongong Posted 25/03/17 02:35 AM Share Posted 25/03/17 02:35 AM Hi yall Quick question... do any tuners here use only the first o2 sensor when referencing lean/rich after flash? Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 16y 6m 22d Gender: Male Location: Adelaide Posted 25/03/17 05:58 AM Share Posted 25/03/17 05:58 AM What do you mean as I don't reference either as I use a wideband for true lambda calculations then after the tuning is done the factory o2 sensors are only there to maintain the target lambda set by the tune ( +/- 0.02 lambda swing ) what exactly do you want to know ? Link to comment Share on other sites More sharing options...
NathanB Member 136 Member For: 11y 6m 29d Gender: Male Location: Melbourne Posted 25/03/17 11:40 AM Share Posted 25/03/17 11:40 AM Hey would you recommend getting a wideband and gauge fitted to an xr as a way to keep an eye on it or is it a bit of overkill? Link to comment Share on other sites More sharing options...
el-dub801 Member 44 Member For: 12y 8m 15d Gender: Male Location: Wollongong Posted 25/03/17 12:01 PM Author Share Posted 25/03/17 12:01 PM @JETURBO Just curious as my 2nd o2 sensor has never been connected. I realise now my dislexia (derr) took over when I initially wrote the post. I meant "does the ecu only use first o2 sensor for reference after flash?" Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 16y 6m 22d Gender: Male Location: Adelaide Posted 25/03/17 12:35 PM Share Posted 25/03/17 12:35 PM It's common for tune shops to turn off the 2nd o2 sensor especially when a big cat has been installed yes nathan it's a good idea 1 Link to comment Share on other sites More sharing options...
el-dub801 Member 44 Member For: 12y 8m 15d Gender: Male Location: Wollongong Posted 25/03/17 12:40 PM Author Share Posted 25/03/17 12:40 PM That explains that then. To me it seems useless anyway - why have another sensor downstream. Ive logged it and its exactly the same reading, just slightly delayed. Also, @JETURBO do you know of anyone that can supply higher flowing versions of the standard 4bar bosch fuel regs? Tia Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 19y 3m Gender: Male Location: Perth Posted 25/03/17 01:03 PM Share Posted 25/03/17 01:03 PM Post car O2 sensor measures cat efficiency. It has no bearing on closed the fuelling. 1 Link to comment Share on other sites More sharing options...
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