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View Full Version : Power Mods o2 voltage Q?



KPowerEP3
09-25-2007, 08:10 PM
OK, so I have an APEXi turbo timer in my car, and one of the display options is o2 voltage and another is air fuel ratio, and the AFR doesn't show up. The weird thing is that the o2 voltage, just say, for warm idle reads about 2.62 on the readout, and my question is is there some trick to the readout on these things, or is it possible there's a wideband already on the car?

Tech5
09-25-2007, 08:17 PM
Matt want to race my little honda? by the way, O2 should have Battery volts, an the AFR it just hooks up to your signal wire, an should be in the rich/lean as you cruise, then runs to rich at full throttle, an when you let off, it should be in lean, then when at idle, depending on if there is cams, should bounce back an forth, rich/lean, all the AFR Not wideband, is like a volt meter, it just reads your computer, to show you its, working, WIDEBAND is a true, reading, I like mine, around 13.5-14.5 reading, ALSO did you call about the honda, thanks Joshua

KPowerEP3
09-25-2007, 08:49 PM
That's the thing though...the AFR readout on the display doesnt work, and it was designed for stock o2...

that's the reason I'm asking, a narrowband output voltage should be somewhere between .1 and .5 volts, but my o2 voltage, of course it fluctuates with throttle/load conditions, but like I said, my output voltage is around 2.6x volts at a warm idle...

as far as running the honda...I will once I get all the little bugs worked out, and I called the InsCo on the EP, but haven't heard back from them yet.

Tech5
09-25-2007, 08:54 PM
LMK, if you want come by the shop Ill fix it, for you, LMK about running my EH-2 Later

KPowerEP3
09-25-2007, 10:24 PM
anyone else have any ideas? voltage thing is throwing me off.