I know this should be simple but it's giving me some trouble. First, i have an autometer sportcomp digital a/f gauge. There are three wires, red - 12v ignition, black - good engine ground, and purple - signal wire. I have an 05 WRX. I hooked the red wire to the ignition wire from the clock wires, the ground to the ground on the clock wires, and the purple wire to the #17 on B135, where it's supposed to go according to the ECU pinout pages I found.
The problem is that it is getting power because the green light farthest on the rich side lights up but that's all, no other ones and it doesn't change. (My car is basically stock and I know it cant be running THAT rich.) I tried it without the signal wire too and it did this same thing so that leads me to believe that there is something wrong with the way I hooked up the signal.
All I did was strip a little off of #17 on B135 (The only connector with 10 pins across. I think it was a white wire with a black stripe. It was in the middle row of the connector, third one in from the left.) and splice in the wire with a little bit of solder. (Which probably voided a lot of my warranty right?)
Would this be the correct way to install it? Do I have to program it somehow or anything? If this is all correct, I guess I will just recheck all the wires.
Also, I know a narrow band a/f sensor is not the best way to go but for the time being it will serve my purpose so please dont tell me to get a wideband.