hey all...im in the middle of installing my autometer narrowband A/F guage & i used the how to guide on here but i cant seem to find the purple w/ white wire that im supposed to hook the signal wire to. can nebody help me locate this wire. the how to guide said it was for an ls & ss but i only found a pink w/ white wire in the bundle next to the ECU. I NEED HELP NOW!! LOL