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Need help with o2 wireing
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Neal77 Offline
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Post: #1
Need help with o2 wireing
I have a 1999 Honda accord 2.3L and I purchaced Mike's EFIE. Following the instructions I disconnected the connection going to the o2 sensor. I used my voltage meter to check the wires comming from the computer and found the wire that is 12v. So far so good but when I check the other wires 2 are reading 3 volts and the other is reading 2.8 volts. According to the directions 2 wires should be 0 volts. Anyone know what is going on?

Thanks
Neal
06-17-2008 06:30 PM
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mike Offline
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RE: Need help with o2 wireing
First of all, probe the wires while they are connected to the sensor, not disconnected.

But secondly, I'm pretty sure you have AFR sensors there. The computer gives either a 3.3 volt or a 2.8 volt reference to the sensor and then reads the current returned from the sensor to know how much oxygen is in the exhaust. As this is incompatible with an EFIE, you'll need to do another handling on it.

Please see: http://www.fuelsaver-mpg.com/doc/HowManyEFIEs.html

Your handlings for an AFR sensor are:
1) o2 extenders obtained from ebay
2) MAF handling as per http://www.fuelsaver-mpg.com/doc/TuningForMileage.html
3) IAT and CTS handlings as per the same reference.
4) AFR sensor resistor, also same reference.

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06-17-2008 09:13 PM
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Neal77 Offline
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RE: Need help with o2 wireing
Thanks for the info Mike.

If it turns out that I can't use it will i be able to return it?

I haven't had a chance to mess with it yet. Its been too damn hot here.

Neal
06-21-2008 11:21 AM
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mike Offline
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RE: Need help with o2 wireing
Yes, that's not a problem, as long as you haven't cut the cable, or damaged it in some way. But if it's still in a condition that it can be sold as new, there's no problem. Note, I don't care about the original bubble wrap bag. I can give it a new one of those.

You can send it to

FuelSaver-MPG
PO Box 181
Tolovana Park, OR 97145

You can just print off this thread and send it along. Be sure you state your real name because I don't know who people are by their forum screen name. I need the name on the account you purchased with.

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06-22-2008 08:26 AM
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