Question about my 94 Bronk

[95F350XL]

I guess this applies to all then gen, but 94 with MAF, has O2s in the y pipe under where the manifolds are, but both sides arnt hooked up, cant find the harness, there is also an O2 infront of the cat where the 2 pipes meet, and that 1 is hooked up. Is it supposed to have 3 O2's or 1 O2? Or whats the deal lol.

 

[Skandocious]

Mine has 2...

 

[95F350XL]

That helps, where at ding dong.

 

[Skandocious]

Both before the cats on the downpipes right after the manifolds.

 

[Lost]

I have only the single by Y at cat from factory . And the 3 or 4 I got MAf stuff for swaps had the single. But Who know I find odd stuff all time from Ford.

I have access to couple for parts I'll look.

 

[Truckin4life]

I have one before the cat...

 

[95F350XL]

Humm, y do I have 3? Wierd, on another note, ck the bronk section, more wheelin damage.

 

[conanski]

The O2 right in front of the cats is correct for a '94 so those manifolds with sensors in them are not the originals on that truck. Cali trucks are the only ones with dual upstream sensors before OBD-2 was impelemented and the third sensor would be after the cats.

 

[95F350XL]

The 2 O2's arnt in the manifolds, there in the Y pipe, and the 3rd O2 would be before the cat, makes no sence. 3 before the cat?

 

[conanski]

I have never seen a Y pipe with 3 pre cat sensors so maybe somebody had additional bungs welded into it. OBD-1 trucks were never equipped with a 3 sensor system and even with the OBD-2 system the 3rd sensor is located behind the cats.