[jaybaum96]

If i were hooking up an Air/Fuel Ratio Gauge, there is one signal wire coming off the gauge, this needs to hook up the the "02 Sensor Signal" wire. On the front 02 sensor there are four wires. One is ground, one is power, and there is one that is a Low input and another high input into the pcm. From what i can find from searching, would i tap into the purple one (high input) for signal?

Also, where is the 3100's oil pressure light switch located? Anyone have a good description or picture of it/where it is?

This post has been edited by jaybaum96: 13 March 2010 - 03:50 AM

[me6894]

Yes you need the purple wire but get an adapter harness or it will f*ck up your o2 readings if you just splice into the o2 harness.

[me6894]

Yes you need the purple wire but get an adapter harness or it will f*ck up your o2 readings if you just splice into the o2 harness.

[me6894]

Yes you need the purple wire but get an adapter harness or it will f*ck up your o2 readings if you just splice into the o2 harness.

[jaybaum96]

me6894, on 13 March 2010 - 08:50 AM, said:

Yes you need the purple wire but get an adapter harness or it will f*ck up your o2 readings if you just splice into the o2 harness.

Any idea where to get the adapter harness for a 3100? Buttttt... i was reading in the gauge instructions and on other forums that it is fine to splice into the engine harness before the 02 harness. EX: the wire coming from the pcm to the quick disconnect (splice there), DONT splice after the quick disconnect between the connector and 02. Would that be fine?

This post has been edited by jaybaum96: 13 March 2010 - 10:31 AM

[me6894]

I would NOT splice into the PCM harness. If you have to splice into something use the o2 harness since that can be easily changed if something gets messed up. Splicing into the main wiring harness is just asking for problems.

[jaybaum96]

Ehhh, im not feeling splicing into the o2 harness because everywhere i find a read-up says no. haha. I spliced into my harness for a tac signal and it works great with no problems at all. Ive had that spliced for over a year now...

[mrclean]

so we hooked up the gauge in jays car, and then this is the result we got when tapped into the purple wire.



His car bogs from time to time, so could it be that its a bad o2 sensor? He has no check engine though.

[jaybaum96]

and to add to this, when i was driving and my car was hesitating/bogging the A/F gauge was bouncing back and forth from lean to rich at the same rate or tempo as the bog. Sounds like my first o2 sensor is going to me... any suggestions?

[me6894]

The gauge is supposed to bounce back and forth. Its a narrowband not a wideband. It won't read actual afr unless you're wot or in open loop. O2s are supposed to bounce from rich to lean.

[jaybaum96]

me6894, on 13 March 2010 - 09:06 PM, said:

The gauge is supposed to bounce back and forth. Its a narrowband not a wideband. It won't read actual afr unless you're wot or in open loop. O2s are supposed to bounce from rich to lean.

Yes i know it is supposed to bounce back and forth, but is the reason it is doing it so rapidly because of a faulty o2 sensor is what i am saying. I have friends who have A/F gauges in their cars and they dont bounce anywhere close to the rate at which this one does...

Edit: and in open loop you loose power, which is what my car is doing just about every time i give it gas between 20 and 40 mph. Also when eric and i tested the voltage, it was stuck at .14 volts. The car was warmed up, and even with revving the volt reading did not change what so ever.

This post has been edited by jaybaum96: 13 March 2010 - 10:24 PM