need help

[LA240sx]

hey im new to the forum. I have a 98 240 and im trying to find the hole in the fire wall so i can run some gauges but i cant find it anywhere. Also, i tried hooking up my a/f gauge and i found three wires running off of the o2 sensor which comes off the header-2 white and one black. I tried one of the white wires and the gauge worked but everytime i used my power window it went to lean and it never left stoich besides that (it acted like a voltmeter). so i decided to try the other white wire and now the gauge doesnt work at all. If anyone could help me i would greatly appreciate it.

[Ni2s4s0aSnX]

there should be a hole in the fire wall behind the steering column.

[LA240sx]

Thanks im gonna give that a try

[Checkered-Member]

Or you can just drill a new a hole...

Also, the A/F gauge is worthless, it's a pretty light show, so if you like that, more power to you.Also since you are splitting the stock O2 sensor wire the ECU won't read it correctly, because you changed the voltage on the wire...