98 80series 1fzfe has no oxy senors why or cat ???

[hdgod]

HI can any one tell me why my 98 80 series 1fzfe has no cat or oxy senors and early 80s had cat and 2 oxy sensors and can the oxygen sensor be fitted to make this a closed loop ecu ?? , have seen 100 series 1fzfe with no cats or oxy senors ,what was toyota doing as a closed loop system is better for fuel use then open system any help would be great thanks

[Simmo88]

I'm not too sure. As far as I can work out my 1993 has one O2 Sensor before the Cat, and that is all. I was looking to get a new exhaust, but the ones I have seen do not have cats. Does anyone know why or am I missing something? I thought all cars post 1986 or what ever it was had to have cats?

[Simo63]

I'm not too sure. As far as I can work out my 1993 has one O2 Sensor before the Cat, and that is all. I was looking to get a new exhaust, but the ones I have seen do not have cats. Does anyone know why or am I missing something? I thought all cars post 1986 or what ever it was had to have cats?

Not sure about the O2 sensor but the Cat Convertor is probably not fitted because they aren't or at the time weren't considered cars, rather commercial vehicles. Not sure when commercial or all vehicles required Cat Convertors but likely after 1998 models?

Cheers
Simo