i am lost on how to wire up an air fuel gauge. i know the positive and negative but what do i hook the other wire up to.. its a digital gauge. its the autometer sport comp... idk if that helps lol please help me..

 

I would assume that you car talking about a narrow band that does not come with its own sensor. The guage is about worthless honestly. I think there is a purple wire on you guage looking for 02 signal, you would have to go down under the car and multmeter the factory o2 sensor to find out which wire is the one you need. I am sure they are in the car near the passenget kick panel where the bundle goes to the computer.

 

how would i find out where the one on the ecu is