[Diy_efi] Possible method of partial repair of damaged O2 sensor (was designed for O2)

[Mike V]

HI Mike,
your general point makes alot of sense, as the
3-wire heated GM sensors tend to last a long time
in the presence of heavily leaded race gas.
I've done it many times.
I'm not sure of the part number, but the heated 3-wire sensor from the
GMC Syclone/Typhoon trucks survives well (not forever) in leaded petrol
situations.   Wishing all the best to the motorhead mates down-under.
Mike V.  Cleveland, OH USA

At 08:54 PM 6/2/2005 +0800, you wrote:

>Anyway, I toyed with the old O2 sensor and a propane torch in normal
>atmosphere on the bench for about 10 - 15mins, I gave it a bit of a
>hammering with a hot O2 rich flame hoping I'd burn off any lead deposits
>and watched the output wander around, cant recall the exact figures - it
>was about 10yrs back afterall.
>
>About a week after that I had occasion to try it, I let it run for a normal
>tankful of ULP but had the initial AFM cal set to leaner than normal.
>Anyway,  after about half a tank of use mostly city it seemed to settle
>down. Another week or so later I swapped back the good one and couldnt
>notice much difference overall. Swapping back and forth twice
>more if i recall showed minimal difference. I ended up leaving it out as I
>couldnt be sure it would last the long term, I still have it for reference.
>
>Does anyway think the propane torch trick really works longer term,
>did seem to make quite a difference for me though it may not have been
>damaged so much in the first place - who knows ?
>
>I wonder if a more efficient 'repair' would be to heat it with a torch and
>play some pure gaseous O2 over it for a few seconds and repeat this
>cycle a few times,