please i need help where i can hook the purple wire in te 02 sensor

 

hook it to the ECM

 

that or: pending on your o2 sensor, if it is a 4 wire, colors should be grn, blk,blk,and white. white would be the signal wire. again, depending on your o2. mine on my 92 integra is a 4 wire like i just explained. most of the time its easier to do it this way, could be difficult finding signal wire into your PCM from the o2. through the fire wall and straight down baby. good luck, hope this helps.

 

Closer to the ECM the better. It works on impedence. You want a slow non irratic signal. Find the signal wire into the ECM. if you need the plug and pin PM me ill get you the info for your car.

 

also if you tap directly to the o2 sensor the extra wire could throw off the signal and give your ecu false readings...which is bad


but that doens't even get to the point that you just bought a light show...if you want a real a/f guage get a wideband

 

if im not mistaken, the signal will be irratic befor the ecu no matter where you splice, o2 sends an analog signal of lean rich lean rich lean rich. the AD converter in the imput device in the ecu converts the analog(irratic) to a digital signal with the ecu can read, which you cant plice into, so no matter where you instal the wire, you will get an irratic signal if installed proerly.

 

yes wideband would be way better, but you can get a nice reading from a digital narrowband as well.

 

 

Well yes and no. Your correct on how it converts it, but why do you think it tells you to hook it on the ECM side of ANY plugs ? A plug is huge resistance. The Autometer gauge needs the closest to the ECM signal it can get. the ECM can adjust for the wire length "impedence" it knows how to adjust for the loads. The Autometer gauges doesnt. Without getting WAY into it. The closer to the ECM the better.

 

true, i have an a/f guage and it is directly to the o2, (tenzo r) and have had no problems with it, worrks exactly the same as my buddy's and his is straight to the ecu (autometer)