camarors8992
NAXJA Forum User
- Location
- Liverpool, New York
So to speak anyways. My 98 4.0 auto is running weird and thew 4 codes, all of which say the upstream and downstream o2 sensors aren't working properly. I replaced the upstream one last night under warranty, but the CEL is still on and last night I did some driving to see if it fixed the problem/turned the CEL off. Nope, When leaving a light after idling or when I first tired driving after starting it it just backfires, stumbles, no power then straightens out to perfect in seriously a matter of 5 seconds. I drove about 30 miles, and was going to do the same today. Any ideas ? I think it's kind of funny both o2 sensors threw a code at the same time.