which wire is the o2 sensor wire on the ecu? anybody have the diagram of the ECU wires? I need to install my autometer a/f ratio gauge. thanks

 

it will get better readings if u tap the cable as close to the O2 as posible,,,,,

 

what happens if i tap it right after the 02 sensor? Lets say the first it's the o2 sensor, then theres a connector.. should I tap it right after the connector?

 

Your A/F gauge is going to be delayed anyway and it only gives you a general idea as to the on goings of the engine so really it's not going to matter where you put tap into the line. On my old car I used a tap splice right before it came into the ECU and it was fine. The delay you'll see is probably only a split second and something you're not really going to notice no matter where you tap it.

 

i see. Well, the part where it comes to the ECU. Is it on pin C16? I have a 91crx si.

 

Yes, it's C16. I tapped right into it right before the ecu, and it works just fine.

 

ok, i just tapped it in.But now there's no light. but under hard acceleration, the first red led lights up slowly but only on that one led. When i let the gas go.. it turns off. what does this mean?

When i unplug the tap to c16, just one green led on the rich side lights up.

 

Where do you have the negative and positive connected to?

 

I grounded the Negative to a bolt under the dash (where i have my other gauge grounded to)

and i'm pulling the power source from my radio remote. Do i have to find another spot for it?

 

well, i just fixed this problem.. I learned that you should not tap the wire to the ECU. Doing this might not get you any reading. SO i went ahead a tapped it to the o2 wire on the engine bay. Now it works perfect.

 

I would use the accessory line going to your head unit. That way if you turn the radio off for some reason your A/F gauge doesn't turn off as well.

 

yea, it is connect to the radio. It dosnt turn off when i turn off my radio.