92 4.0 Ranger O2 Sensor Location

[Deppdog]

From what I have read, it sounds like there should be 2 Oxygen Sensors on my 92 Ranger with a 4.0. I can only find one...just right before the dual cats (upstream). I have looked everywhere along the exhaust and that's all I can find. I checked both manifolds and the Y pipe that comes off the manifolds and connects to the cats...that's it...one! Any ideas? I appreciate the help!!! Also, if anyone has the part number(s) for the sensor or sensors I have, I would greatly appreciate it!

Thanks!
Steve D

 

[big91explorer]

Should be one on each downpipe.

 

[Sasquatch_Ryda]

Its only got 1 heater oxygen sensor. Same as my 91 only has 1, just before the cats.

 

[AllanD]

90-92 NON-Cali have only a single HEGO in the Y-pipe.

ALL 1993's (and 1994's) have dual-HEGOs one in each downpipe.

all '95-up have THREE (a cat monitor behind the cat)

AD

 

[Deppdog]

Thanks to all who answered!!! I appreciate the help!!!