Dave S Posted May 1, 2003 Share Posted May 1, 2003 Does anyone know what the stock O2 sensor voltages correspond to? eg when its lean / rich thanks Dave Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted May 1, 2003 Share Posted May 1, 2003 0v is lean, 5v is rich. Taka a look at this article:- http://www.supras.com/pub/SONIC/MA70/Vfoutput.txt It is for a MKIII but seems to apply to a MKIV as well and probably most Toyota's with O2 sensors. Quote Link to comment Share on other sites More sharing options...
Dave S Posted May 2, 2003 Author Share Posted May 2, 2003 I read from that article that anything more than 0v to less than 5v is then 'Normal'. AAAAAH.....this I take it is why a Wide Band O2 sensor is used to tune ,it must give a linear reading. I'm using the Greddy E-01 to monitor the O2 , A/F etc I think a rolling road visit is on the cards cheers Dave Quote Link to comment Share on other sites More sharing options...
mos Posted May 2, 2003 Share Posted May 2, 2003 Yes it is impossible to tune with a narrowband sensor, all a narrrowband will give is a rough indication of rich or lean. To tune you need a wideband of and their are several on the market today. I currently run the techedge wideband on my sz and it has been invaluable for tuning so far. Quote Link to comment Share on other sites More sharing options...
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