Question on o2 Sensors...

how do you know when youre wires are on their way out?i have some blue 9mm ford wires and they are turning yellow, ive had them for about a year

Well, normally the jacket changing colors is not the first thing to go. :lol:

When I check wires, I will either look for spark leakage or ohm them out to see how they're doing.

Good luck.
 
Yeah thanks for the help... Going to try and order some wires before I leave on my trip. But do you think that leakage would cause my car to lose mileage? I mean the car doesnt run rough really. A little shake here and there at idle but nothing really noticeable.