Recent content by red93yj

thanks for the help ecomike.

I have a 98 TJ 4.0 with the EXCACT same symptoms. Im planning to buy this upstream o2 sensor, but first I have two questions, I cant find an o2 heater fuse or relay ANYWHERE. Second question.... would this o2 failure cause me to get HORRIBLE gas milage all the time? Or does it finally warm up...