Ok, I remember that I need to mangle a socket to R/R this, anybody
remember what size I need?
Michael Maskalans wrote:
>
>
> Barry Oliver wrote:
>
>>
>> Ok, I am wondering. I have a 99, 5.2L 4x4 with 130k on it.
>
>
> > I have never replaced the O2 sensors
>
>> and AFAIK they are all original. I have read that 60-80k is the
>> replace interval, but that a bad O2 = MIL.
>
>
>
> if it's really bad, it'll give you a MIL, but degraded economy indicates
> a poorly performing O2 sensor. Replace the forward one at least, on
> your '99 the rear O2 does not effect fuel trim so you can ignore t until
> it trips a MIL. I still have my original at 150k on my truck, hanging
> out in a bracket on the frame in nice clean O2 rich atmosphere.
>
> - Mike
>
>
>
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