O/2 Sensor how many is an 86 svo supposed to have?

[SnakePlisskin]

I found another O/2 sensor down near bottom of the downpipe today while I was looking at underside of the car, wiring was cut off. Is this a factory one or I think someone may have added this. Exhaust is solid, but it's had work done to it, flowmasters welded in and the the tailpipes welded on also.

The O/2 at top of turbo elbow is there and factory wired correctly. Also whats diameter of a factory downpipe, mine looks rather large and the cat is still there also.

Thanks in advance!

[Meotchh]

There is only one O2 sensor on a stock SVO.

[in2fords]

Like Mitch said, only one sensor stock.
Im not positive if the SVO has a 2.5 or a 2.25" stock exhaust? I do know I had to weld in a 02 bung near the bottom of my down pipe for my wideband sensor. It could be possible that there was a wideband in there.

[brsvo]

Wideband location would be my guess. The stock location is in the turbo outlet elbow. I believe the stock pipes were 2 1/4. My car had an aftermarket D/P and high flow cat that were 2 1/2 when I got it.

[FinnSVO]

Just removed my old stock DP, it was 2,25. Strange enough that midpipe between DP and muffler was slightly larger, almost 2,5. Looked original ford product

[SnakePlisskin]

Ok Thanks guys, it is what I thought an add on sensor, thanks for the confirmation!

[Schlodes]

Someone prob had a wideband in the car at some point....